struggle vs wrestle

struggle

verb
  • To strive, to labour in difficulty, to fight (for or against), to contend. 

  • To strive, or to make efforts, with a twisting, or with contortions of the body. 

noun
  • A contortion of the body in an attempt to escape or to perform a difficult task. 

  • Strife, contention, great effort. 

wrestle

verb
  • To struggle or strive 

  • To take part in a wrestling match with someone 

  • To move or lift something with difficulty 

  • To fight. 

  • To throw a calf etc in order to brand it 

  • To contend, with an opponent, by grappling and attempting to throw, immobilize or otherwise defeat him, depending on the specific rules of the contest 

noun
  • A struggle. 

  • A wrestling bout. 

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