Since you're soliciting feedback, this is what I've picked up from reading people's training logs and such.
The higher the volume, and/or the higher the intensity, the less frequently people deadlift (or squat or bench or whatever). Many who deadlift 85%+ of their 1RM on a regular basis train once a week, once every two weeks, and sometimes once every 4-6 weeks.
That said, you don't always need to lift at a max to increase your max.
After a time, you can't just work up to a max single and leave, you need to get some volume in there somewhere. That volume can be on the front end, working up to that single, or on the back end, with some back-off sets. Or, for that matter, multiple singles.
That volume can be all in one session, or it can be spread out across multiple sessions. Some people look at it as accumulating volume (total number of work sets or work reps), some people look at it as accumulating load (work reps * weight).
Some sort of deload is almost always required after you hit a new max. However, rarely do I see people drop any lower than about 70% of that max. This deload period gives the body some additional time to adapt to the training.
In general, it seems to be better to find the minimum amount of volume that keeps getting you stronger, than to do too much volume. Once your body gets adjusted to higher volume, you generally have no place to go but up.
These are just some patterns and rules of thumb I've seen. Nothing here is definitive.