eventually vs lengthily

eventually

adv
  • In the end; at some later time, especially after a long time, a series of problems, struggles, delays or setbacks. 

  • Possibly, potentially, perhaps 

  • For some tail; for all terms beyond some term; with only finitely many exceptions. 

lengthily

adv
  • In a lengthy way, in a manner that is long and drawn out, especially in time. 

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