shilly-shally vs sit on the fence

shilly-shally

verb

  • To vacillate. 

  • To procrastinate. 

adj

  • Indecisive; wavering. 

noun

  • Indecision; irresolution. 

sit on the fence

verb

  • To remain neutral on a certain topic, to not have a stance or opinion. 

How often have the words shilly-shally and sit on the fence occurred in a corpus of books? (source: Google Ngram Viewer )