filtrate vs strainer

filtrate

noun
  • The liquid or solution that has passed through a filter, and which has been separated from the filtride / filtrand 

verb
  • To filter. 

strainer

noun
  • A device through which a liquid is passed for purification, filtering or separation from solid matter; anything (including a screen or a cloth) used to strain a liquid. 

  • A perforated screen or openwork (usually at the end of a suction pipe of a pump), used to prevent solid bodies from mixing in a liquid stream or flowline. 

  • One who strains. 

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