drop in the sea vs fraction

drop in the sea

noun
  • A very small or insignificant amount; something of little importance. 

fraction

noun
  • A small amount. 

  • A ratio of two numbers (numerator and denominator), usually written one above the other and separated by a horizontal bar called the vinculum or, alternately, in sequence on the same line and separated by a solidus (diagonal bar). 

  • A component of a mixture, separated by fractionation. 

  • A part of a whole, especially a comparatively small part. 

  • In a eucharistic service, the breaking of the host. 

verb
  • To divide or break into fractions. 

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