I’m currently reading The Duke and I and the author is constantly using the word “acerbic”. I had never heard of the word before now and had to google the definition. The word has shown up so much that I’m tempted to go through the book and count its appearances lol.
Have you noticed any authors having favorite words that they use page after page?
Also the phrase: “(s)he raised an eyebrow”. He used that over 40 times in one of his books.
Also “(s)he pulled his/her mouth into a line.” Constantly in the Stormlight archive, at least.