benefit vs weaken

benefit

verb
  • To be or to provide a benefit to. 

  • To receive a benefit (from); to be a beneficiary. 

noun
  • An advantage; help or aid from something. 

  • An event, such as a theatrical performance, given to raise funds for some cause. 

  • A payment made in accordance with an insurance policy or a public assistance scheme. 

  • Intended audience (as for the benefit of). 

weaken

verb
  • To become weaker or less strong. 

  • To make weaker or less strong. 

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