relax vs strive

relax

verb
  • To become more lenient. 

  • To become loose. 

  • To become less severe or tense. 

  • To make something (such as codes and regulations) more lenient. 

  • To calm down. 

  • To relieve (something) from stress. 

  • To make something less severe or tense. 

  • To make something loose. 

strive

verb
  • To try to achieve a result; to make strenuous effort; to try earnestly and persistently. 

  • To struggle in opposition; to be in contention or dispute; to contend; to contest. 

  • To vie; to compete as a rival. 

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