castoff vs enervate

castoff

adj
  • discarded, rejected. 

noun
  • Something that has been rejected or discarded; a reject. 

enervate

adj
  • Made feeble; weakened. 

verb
  • To weaken morally or mentally. 

  • To partially or completely remove a nerve. 

  • To reduce strength or energy; debilitate. 

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