Frequency has varied greatly depending on age and how much sex I was getting at the time. When I first discovered masturbation as a kid it was several times a day. When I took a shower I did it repeatedly, maybe 3 or 4 times in a row. Oh! To have that ability again!
In my teen years I thought constantly about sex to the point of it being a distraction and did it at least twice a day, often more.
We were both 21 when we got married and I didn't do it so much because we would have sex at least twice a day. A warm, soft, sexy, desirable and equally horny woman beats the palm of my hand any day.
As time went on, I wouldn't call it boredom because we still had enjoyable sex almost every day, but we were both ready to "see wnat's on the other side". During that time I fantasized about all sorts of scenarios with both sexes and often masturbated to them. Then we got in to swinging and the frequency went down again because we were partying almost every weekend for years. But one thing was missing, bisexual men, and when I did masturbate it was always to a fantasy of M2M sex and I would find males to have sex with outside of the swinging community. I quit that completely except for a couple long time "friends" and we cut down our random swinging, also limiting ourselves to a few "friends" when AIDS and other STDs became a real concern. Now I'm in my 60s. I still masturbate every week or so if I don't have some kind of sex with my wife or use E-Stim. If I masturbate I always need a fantasy going on in my head to "make it work" and it's always about M2M sex. I