achieving vs imperfection

achieving

noun
  • Achievements, emphasizing the process of accomplishing them. 

imperfection

noun
  • Those qualities or features that are imperfect; the characteristic, state, or quality of being imperfect. 

  • Something that makes something else less than perfect; a blemish, impurity, error, etc. 

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