dismount vs get up on

dismount

noun
  • The part of a routine in which the gymnast detaches from an apparatus. 

verb
  • To come down; to descend. 

  • To throw (cannon) off their carriages. 

  • To make (a mounted drive) unavailable for use. 

  • To (cause to) get off (something). 

get up on

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