compass vs lock in

compass

verb
  • To surround; to encircle; to environ; to stretch round. 

  • To go about or round entirely; to traverse. 

noun
  • A pair of compasses (a device used to draw an arc or circle). 

  • A magnetic or electronic device used to determine the cardinal directions (usually magnetic or true north). 

  • The range of notes of a musical instrument or voice. 

  • Moderate bounds, limits of truth; moderation; due limits; used with within. 

lock in

verb
  • To fix the value of (something potentially variable). 

  • To prevent from escaping or deteriorating. 

  • To secure (someone or something) in a locked enclosure. 

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