riotous vs sparse

riotous

adj
  • Having the characteristics of a riot. 

  • Unrestrained and boisterous; degenerate or dissolute. 

  • Causing, inciting or taking part in a riot. 

sparse

adj
  • Having few nonzero elements 

  • Having widely spaced intervals. 

  • Not dense; meager; scanty 

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