combat vs strive

combat

verb
  • To fight (with); to struggle for victory (against). 

  • To fight; to struggle against. 

noun
  • A battle, a fight (often one in which weapons are used). 

  • a struggle for victory 

strive

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

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

  • To vie; to compete as a rival. 

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