as often as not
(idiomatic) More or less half of the time; on many occasions but not always; frequently.
In the afternoons, as the canvas of our tents buffeted in the sand-driving wind, our thoughts were, as often as not, 6,000 years in the past. Source: Internet
If I try typing one handed, I hit s about half the time when I am headed for a. If I try to use the phone as a flashlight while doing anything else, I drop the phone as often as not. Source: Internet
‘We, the readers, know no more than Watson is able to tell us, and as often as not that is not very much.’ Source: Internet