lac vs lakh

lac

noun
  • Laceration. 

  • A resinous substance or lacquer produced mainly on the banyan tree by the female of Kerria lacca, a scale insect. 

lakh

num
  • One hundred thousand; 100,000; or with Indian digit grouping, 1,00,000. Often used with units of money. 

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