Referring to the opening post:
Mister, you don't know about sex.
Sex is 24/7.
From waking with a kiss, in the cosy bed you provided, through the gentle (not always sexual) touches, hand holding, kind words, texts, emails, telephone calls, letters you write to her and post, hugs, whispers, small caresses, thoughtfulness regarding household tasks and bringing small gifts to show you care, being where you say you'll be when you say you'll be there, no way working 60 hours a week because that doesn't leave you time to make love to your wife properly, to ensuring she has hobbies, interests, time to herself, to ensuring she has outings and events with you (and sometimes as a family) to look forward to, new clothes to wear, regular appointments with a decent hairdresser, taking the family out for meals or bringing takeaway so she doesn't have to cook, putting the children to bed so she can have time to herself, for a bath (with the luxury toiletries you thoughtfully provided) and dress in her new, attractive but not overtly sexy loungewear ready for her evening with you, the glass of wine, the conversation about the day and whatever else comes to mind, the 'no-pressure for sex' kisses and hugs, then to bed to do or not do as she desires...
Try it. Keep it going for six weeks. Make it your way of life. Either, you will have a raging hot wife ripping your clothes off at every opportunity, or you'll be well-trained ready for when you move on.
Don't say I didn't tell you. I don't charge for this information. But I should.