recrudescence vs repetition

recrudescence

noun
  • The condition or state being recrudescent; the condition of something (often undesirable) breaking out again, or re-emerging after temporary abatement or suppression. 

  • The production of a fresh shoot from a ripened spike. 

  • The acute recurrence of a disease, or its symptoms, after a period of improvement. 

repetition

noun
  • The act or an instance of repeating or being repeated. 

  • The act of performing a single, controlled exercise motion. A group of repetitions is a set. 

verb
  • To petition again. 

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