I've got an employee who's been with me less than two years. Her mum is in really poor health quite suddenly. She's struggled into work everyday, until I told her to go and WFH for a week, and if she didn't get much work done, so be it, I wanted her to take it easy and not run herself down. Her initial response was that she could perhaps take it as holiday. And she could have, but that would mean she'd have to work the days over Christmas instead as she had insufficient holiday left. It's things like that, where she's looking to cause as little disruption as possible that stand out. She's an excellent worker. Stays late because she truly cares (I run a charity), funny and boosts team morale, a real team player. If she needs a month of, I'll give it to her, because I know she needs it, because she hates not doing her job properly, and has pride in her work.
Then I had this other one. Three kids. Had her MIL and brother (both not working, one on full PIP) living with her and her husband, so always someone at home who could have looked after her kids. First week, she was sick by the Thursday. Fine, you can't help that and hopefully no one is that thick that they'd risk faking a sicky on day 4 of their new job. The next week, one kid was sick for 2 days, and she "couldn't" leave him with MIL or brother and decided she'd not come in for those. Then the oldest kid she wanted assessed for something or other and announced she couldn't make it in the following Friday as the kid had a doctor's appointment. Then she discovered that (due to the nature of my business we have many vulnerable and elderly) my policy was anyone who had COVID needed to WFH until they tested negative, and the day after this policy was made known to her, lo and behold, she's got COVID and needs to WFH. In her 6 months of probation, she had over 3 weeks off and that's not including any weekend time. And the thing about probation is that you pass it, fail it, or are told what you need to improve over a designated extension of probation and then at the end of that, you pass or fail. Fucking right she failed her probation. And wouldn't you know it, she was then trying to concoct some bullshit to go to ACAS with for anything her workshy lazy ass could grab. Unfortunately in trying to do that, she unknowingly fucked up and enabled me to write her a letter stating (in professional and diplomatic terms) that I invited her to shoot her fraudulent shot, and it would guarantee me reporting her for the regulations she had breached. She then turned up at my office and turned on the waterworks, as if that's the adult solution to anything when you know you've been caught. It then transpired that she had a claim against a company for "falling down a pothole in the carpark" and another "have you been in a car accident that wasn't your fault" claim. Oh, and she'd had extensive time off at her previous employer for "stress".
I think she knew she was a piss taker, but her mentality was to expect to get paid for not working and then would just go for a claim when she inevitably got sacked. Not her fault, she was the real victim here and just doing what the system allowed. Everyone else does it, she was just getting what she was "owed". If you pointed any of the above and the poor unethical attitude? Oh she'd gasp in faux naive offence, how dare you pick on poor her for her stress and ill children.
Like OP, this behaviour is a pattern. And it's pretty obvious when you've got one of those workers. People aren't stupid, and employers can recognise people who use any opportunity not to turn up Vs those who genuinely can't come to work that day.