blood, sweat and tears vs travail

blood, sweat and tears

noun

  • A person's determination and hard work. 

travail

noun

  • Arduous or painful exertion; excessive labor, suffering, hardship. 

  • Specifically, the labor of childbirth. 

verb

  • To toil. 

  • To go through the labor of childbirth. 

How often have the words blood, sweat and tears and travail occurred in a corpus of books? (source: Google Ngram Viewer )