debus vs step off

debus

verb
  • To get off a bus. 

step off

verb
  • To avoid a conflict; to back down 

  • To measure by steps or paces; hence, to divide (a space), or to form a series of marks, by successive measurements, as with dividers. 

  • Used other than figuratively or idiomatically: see step, off. 

How often have the words debus and step off occurred in a corpus of books? (source: Google Ngram Viewer )