dearth vs spate

dearth

noun
  • A period or condition when food is rare and hence expensive; famine. 

  • Scarcity; a lack or short supply. 

spate

noun
  • A sudden rush or increase. 

  • A river flood; an overflow or inundation. 

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