expedite vs weaken

expedite

verb
  • To perform (a task) fast and efficiently. 

  • To accelerate the progress of. 

  • To perform the duties of an expediter. 

adj
  • Expeditious; quick; prompt. 

  • Free of impediment; unimpeded. 

weaken

verb
  • To make weaker or less strong. 

  • To become weaker or less strong. 

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