@redshoeblueshoe
The below is copied from another post because it beautifully explains why not everyone gets canvassed. DH was out today, party irrelevant, over a 4 hour period he managed 97 doors.
Do you know how long it takes for 2 people to knock on 100 doors (good practice is to canvas in pairs)?
If a constitutency which has a strong ld presence has only 50 active members for campaigning, then how many doors do you think 25 pairs can knock on in a 2hr session?
Remember that 25 pairs are rarely going to be available for every Canvassing session. Now think about how many Canvassing sessions the local party can organise in a week. Realistically you might get them out for 2 or 3 hours on weekend (no one really wants to do much more than that) and maybe twice during the week (and that'll be harder in December with the dark and cold).
If you assume you can knock on one door every 5 mins (and that's very very optimistic) that's 12 doors per pair per hour. If all 25 pairs turn out (that's very very optimistic) that's 300 doors per hour.
Realistically in reality you are more likely to be closer to 150 doors as a top whack unless your activists are really fanatical.
Across a week assuming that rate that's 150 x 6 hours. That's 450 doors.
The campaign period is 6 weeks so that brings you up to 2700 doors.
There are around 42,000 households in my constituency.
That's why no one is knocking on your door because the logistics of knocking on every door in a constituency are crazy. Just getting leaflets hand delivered to everyone is a feat in itself.
This is why generally speaking only target seats will be canvassed in any great amount with activists called in from neighbouring constituencies rather than doing every constituency.
This is where Labour has a big advantage as they have so many more activists than either the Lib Dems or the Conservatives.