1 vs millionth

1

symbol

  • The number one (1). 

millionth

adj

  • The ordinal form of the number one million. 

noun

  • The person or thing in the millionth position. 

  • One of a million equal parts of a whole. Term ppm (parts per million) is also used. 

How often have the words 1 and millionth occurred in a corpus of books? (source: Google Ngram Viewer )