As a general rule of thumb, a recession tends to hit roughly once every decade. In the last 3 decades we had the early 90s economic downturn, the 2001 dot com bubble burst, and the Great Recession of 08-09. Under normal circumstances, another recession around now would be pretty normal.
But given the hugeness of the last recession, and the slowness of the recovery afterwards due to lack of adequate government investment in the economy, I wouldn’t be surprised if the next recession takes longer to hit. And barring some bubble forming in the meantime, it probably won’t be that rough when it DOES hit.