carry out vs weaken

carry out

verb
  • To hold while moving it out. 

  • To execute or perform; to put into operation; to do. 

  • To fulfill. 

weaken

verb
  • To make weaker or less strong. 

  • To become weaker or less strong. 

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