H vs kay

H

noun
  • A pencil of grade H. 

  • A grade of pencil with lead that makes darker marks than a pencil of grade 2H; a pencil with hard lead. 

adj
  • Pornographic in a way characteristic of hentai. 

character
  • The eighth letter of the English alphabet, called aitch and written in the Latin script. 

name
  • A hypothetical source proposed to underlie the Holiness Code and to have influenced various other parts of the Torah. 

adv
  • Synonym of AH: in the year of the Hegira, used to mark dates employing the Islamic calendar. 

kay

noun
  • The name of the Latin-script letter K. 

  • A thousand of some unit (from kilo-). 

  • A kilometer. 

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