angular mil vs k

angular mil

noun
  • A unit of angular measurement equal to 1/6400 of a complete circle. At 1000 metres one mil subtends about one metre (~0,98 m). Also 1/6000 and 1/6300 are used in other countries. 

k

noun
  • The SI measurement value of 1,000 

  • A kilobyte (more formally KB or kB). 

  • A kilobit (more formally kb), especially in measuring Internet connection. 

  • kilometre or kilometres. 

  • thousand or thousands. 

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

  • The first letter of callsigns allocated to American broadcast television and radio stations west of the Mississippi river. 

intj
  • OK 

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