attainment vs flash in the pan

attainment

noun
  • That which is attained, or obtained by exertion. 

  • The act of attaining; the act of arriving at or reaching; the act of obtaining by exertion or effort. 

flash in the pan

noun
  • A career notable for early success not followed by significant accomplishment. 

  • A transient occurrence with no long-term effect. 

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