strengthen vs wither

strengthen

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

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

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

  • To grow strong or stronger. 

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

  • To augment; to improve; to intensify. 

wither

verb
  • To make helpless due to emotion. 

  • To become helpless due to emotion. 

  • To lose vigour or power; to languish; to pass away. 

  • To cause to shrivel or dry up. 

  • To shrivel, droop or dry up, especially from lack of water. 

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