Stark vs surd

Stark

noun
  • The language spoken in the Ender's Game series, which is nearly identical to American English. 

name
  • A surname. 

  • An unincorporated community in Butts County, Georgia. 

  • An unincorporated community in Pike County, Missouri. 

  • An unincorporated community in Elliott County, Kentucky. 

  • A small town in Herkimer County, New York. 

  • An unincorporated community in Stark County, Illinois. 

  • A tiny city in Neosho County, Kansas. 

  • A small town in Coos County, New Hampshire. 

  • A small town in Vernon County, Wisconsin. 

  • An unincorporated community in Boone County, West Virginia. 

surd

noun
  • A voiceless consonant. 

  • An irrational number, especially one expressed using the √ symbol. 

adj
  • unvoiced; voiceless 

  • Involving surds, or irrational numbers; not capable of being expressed in rational numbers. 

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