creep out vs perturb

creep out

verb
  • To make uncomfortable or afraid; to give someone the creeps. 

perturb

verb
  • To disturb; to bother or unsettle. 

  • To modify the motion of a body by exerting a gravitational force. 

  • To modify slightly, such as an equation or value. 

  • To slightly modify the motion of an object. 

How often have the words creep out and perturb occurred in a corpus of books? (source: Google Ngram Viewer )