embus vs set on

embus

verb
  • to put (troops) onto a bus 

  • to board a bus 

set on

verb
  • To attack. 

  • To be determined to do or achieve something. 

  • To encourage someone, or an animal, to attack someone. 

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