better vs infect

better

verb
  • To give advantage to; to support; to advance the interest of. 

  • To surpass in excellence; to exceed; to excel. 

  • Had better. 

  • To improve. 

  • To become better; to improve. 

adv
  • Greater or lesser (whichever is seen as more advantageous), in reference to value, distance, time, etc. 

  • Had better. 

noun
  • An entity, usually animate, deemed superior to another; one who has a claim to precedence; a superior. 

adj
  • Greater in amount or quantity 

infect

verb
  • To make somebody enthusiastic about one's own passion, or to communicate a feeling to others, or a feeling communicating itself to others. 

  • To bring (the body or part of it) into contact with a substance that causes illness (a pathogen), so that the pathogen begins to act on the body; (of a pathogen) to come into contact with (a body or body part) and begin to act on it. 

  • To contaminate (an object or substance) with a pathogen. 

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