Sentence examples for a jot from inspiring English sources

"a jot" is a correct and usable phrase in written English.
It is typically used to mean a very small amount or insignificant detail. Example: "I don't care for that book one jot." (meaning: I don't like the book at all) "I didn't change a jot of my plans despite the bad weather forecast." (meaning: I didn't change any part of my plans).