Every day for a large portion of the day. I use an org-capture template which lets me capture tasks and I keep all my notes in those tasks including proof-of-concept code, etc. I capture and schedule meetings through the same template which pre-populates things like space for a list of attendees, the agenda, after-meeting notes, and action items which become todos. I even track the amount of time I spend on each so I can fill out my timesheet as I'm in a field where we maintain billable work, etc.
All this to say it's a very flexible system and lends itself well to keeping notes.
All this to say it's a very flexible system and lends itself well to keeping notes.