bestead vs cash in

bestead

verb
  • To profit; benefit; serve; avail. 

  • To help, assist. 

  • To take the place of; replace. 

cash in

verb
  • To profit from something; to take advantage of an opportunity in order to profit, especially financially. 

  • To die. 

  • To exchange for cash. 

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