set against vs size up

set against

verb
  • To cause an individual to be in conflict or opposition with someone or something. 

  • To have a strong feeling of not desiring to do something. 

size up

verb
  • To evaluate; to estimate or anticipate the magnitude, difficulty, or strength of something. 

  • To wear a larger size of clothing. 

How often have the words set against and size up occurred in a corpus of books? (source: Google Ngram Viewer )