mollify vs relax

mollify

verb
  • To ease a burden, particularly worry; make less painful; to comfort. 

  • To appease (anger), pacify, gain the good will of. 

  • To soften; to make tender 

relax

verb
  • To relieve (something) from stress. 

  • To become loose. 

  • To become less severe or tense. 

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

  • To calm down. 

  • To make something less severe or tense. 

  • To make something loose. 

  • To become more lenient. 

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