hourly vs persistent

hourly

adj
  • Occurring every hour. 

  • Unsalaried, paid by the hour; (by extension) blue-collar. 

noun
  • Something produced each hour. 

adv
  • At intervals of an hour. 

persistent

adj
  • Insistently repetitive. 

  • Of data or a data structure: not transient or temporary, but remaining in existence after the termination of the program that creates it. 

  • Describing a fractal process that has a positive Brown function 

  • Lasting past maturity without falling off. 

  • non-transient. 

  • Obstinately refusing to give up or let go. 

  • Indefinitely continuous. 

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