proact vs stand by

proact

verb
  • To take action in advance of an expected event 

stand by

verb
  • To wait in expectation of some event; to be ready. 

  • To support; to continue to support despite things being bad. 

  • To remain loyal or faithful to. 

  • To do nothing. To be inactive in a situation. 

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