call time vs persist

call time

verb
  • To end something. 

  • To announce the closing of a pub for the day. 

  • To call a timeout. 

  • To indicate that an activity, especially the taking of a test, is complete. 

noun
  • The expected time of arrival for participants in a performance event, e.g., a play or concert. 

persist

verb
  • To continue to exist. 

  • To go on stubbornly or resolutely. 

  • To repeat an utterance. 

  • To cause to persist; make permanent. 

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