get stronger vs pull through

get stronger

pull through

noun
  • The trick of apparently cutting the cards while leaving the deck in the same sequence as before. 

  • A length of cord about a metre long with a narrow cylindrical weight at one end and loops at the other. Used for cleaning rifle barrels, by pulling through a piece of cloth. 

verb
  • To clean the barrel of a firearm using a pull through. 

  • To come through pain and trouble through perseverance. 

  • To assist someone through difficulties, injury, pain, etc. 

How often have the words get stronger and pull through occurred in a corpus of books? (source: Google Ngram Viewer )