prolific vs sparse

prolific

adj
  • Similarly producing results or performing deeds in abundance 

  • Fertile; producing offspring or fruit in abundance — applied to plants producing fruit, animals producing young, etc. 

  • Of a flower: from which another flower is produced. 

sparse

adj
  • Having few nonzero elements 

  • Having widely spaced intervals. 

  • Not dense; meager; scanty 

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