elevate vs strengthen

elevate

verb
  • To increase the intensity or degree of (something). 

  • To raise (something) to a higher position. 

  • To direct (the mind, thoughts, etc.) toward more worthy things. 

  • To confer honor or nobility on (someone). 

  • To promote (someone) to a higher rank. 

  • To make (something or someone) more worthy or of greater value. 

strengthen

verb
  • To augment; to improve; to intensify. 

  • To make strong or stronger; to add strength to; to increase the strength of; to fortify. 

  • To empower; to give moral strength to; to encourage; to enhearten. 

  • To reinforce, to add to, to support (someone or something) 

  • To grow strong or stronger. 

  • To substantiate; to corroborate (a belief, argument, etc.) 

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