lax vs relentless

lax

adj
  • Lacking care; neglectful, negligent. 

  • Loose; not tight or taut. 

  • Lenient and allowing for deviation; not strict. 

  • Describing an associative monoidal functor. 

noun
  • Lacrosse. 

  • A salmon. 

relentless

adj
  • Unrelenting or unyielding in severity. 

  • Unremitting, steady and persistent. 

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