1000 vs kilo-

1000

kilo-

prefix
  • Multiplying the unit to which it is attached by 2¹⁰ (1024) 

  • In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 1,000. Symbol: k 

How often have the words 1000 and kilo- occurred in a corpus of books? (source: Google Ngram Viewer )