assert vs swear

assert

verb
  • To declare with assurance or plainly and strongly; to state positively. 

  • He would often assert that there was life on other planets. 

  • To maintain or defend, as a cause or a claim, by words or measures; to vindicate a claim or title to 

  • To insist on the legitimacy of one's rights, opinion, etc; not to allow oneself to be dismissed; to ensure that one is taken into consideration; to make oneself respected; to be assertive. 

  • To use or exercise and thereby prove the existence of. 

  • To set a signal on a line using a voltage or electric current. 

  • To specify that a condition or expression is true at a certain point in the code. 

noun
  • an assertion; a section of source code which tests whether an expected condition is true. 

swear

verb
  • To promise intensely that something is true; to strongly assert. 

  • To take an oath that an assertion is true. 

  • To use offensive, profane, or obscene language. 

  • To be lazy; rest for a short while during working hours. 

  • To administer an oath to (a person). 

  • To take an oath, to promise intensely, solemnly, and/or with legally binding effect. 

adj
  • Dull; lazy; slow. 

  • Top-heavy; too high. 

  • Reluctant; unwilling. 

  • Heavy. 

  • Niggardly. 

noun
  • A swear word. 

  • A lazy time; a short rest during working hours (especially field labour); a siesta. 

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