I can’t answer as to frequency, but I can say that recently a woman I know slightly cheated on her husband of 20 plus years, and the reason I know this is because he hired a private investigator and put the video of her kissing the other dude on Facebook. Apparently he did not include the video of them having sex but it exists. That seems like a really heinous thing for him to do, but if you know this family they’re actually really well raised good members of the community, and he’s clearly extremely hurt, stating that the depth of her lies to him was unreal. This woman’s mother is a saint walking upon the earth, without a shadow of a doubt, and her daughter was what seemed to be a very ethical well brought up mother herself raised in the Christian faith (not the conservative kind but the really decent person kind), so this was all a big shock. Apparently she was just lying to everyone, including her saint of a mother, all along. Her husband asked her to stop the affair (which was with some guy she had known for years) until they separated houses, but she kept on and kept on lying about it until she was caught on tape.
So until someone’s mask slips, you just really never know what someone will do.
The great opera singer Enrico Caruso was the 18th of 21 children, only 3 of whom survived infancy.
Johann Sebastian Bach wrote an opera about coffee addiction.
The Russian composer Tchaikovsky was afraid his head would come off while conducting, so he would hold his chin with one hand while doing so.
The girlfriend of composer Erik Satie wore a corsage made of carrots, and she was a painter and liked to feed the paintings she made. Satie once threw her out the window but she survived.