after all vs lastly

after all

prep
  • in the end, however; used in referring to something that was believed to be the case, but is not; or to an outcome that is not what was expected or predicted. 

  • anyway, in any case; indicates a statement is true regardless of other considerations; used to reinforce or explain a point. 

lastly

adv
  • Used to signal that the speaker is about to yield control of the conversation. 

  • Used to mark the beginning of the last in a list of items or propositions. 

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