The Idiom of Three Days and Three Nights

People mistakenly think Jesus was talking about Jonah and Harv in the belly of the well for three days, whatever. Sometimes they think that it's three full days and three full nights. It's just like saying, how many days did you work this week? Like, oh, I worked too. If an idiom, it's a, it’s a bigger speech. And that can inform a pretty concise case as to, yeah, this is probably like a good example,. But there are hundreds of years apart. This isn't circular reasoning. That's what kind of worked my years up. Bear with me now.