past vs perfective aspect

past

noun
  • The past tense. 

  • The period of time that has already happened, in contrast to the present and the future. 

adv
  • In a direction that passes. 

prep
  • Beyond in place or quantity 

  • Any number of minutes after the last hour 

  • Having recovered or moved on from (a traumatic experience, etc.). 

  • No longer capable of. 

  • Passing by, especially without stopping or being delayed. 

adj
  • Of a period of time: having just gone by; previous. 

  • Having already happened; in the past; finished. 

  • Following expressions of time to indicate how long ago something happened; ago. 

  • Of a tense, expressing action that has already happened or a previously-existing state. 

perfective aspect

noun
  • A feature of the verb which denotes viewing the event the verb describes as a completed whole, rather than from within the event as it unfolds. For example, "she sat down" as opposed to "she was sitting down". Since the focus is on the completion of what is expressed by the verb, this aspect is generally associated with the past and future tenses. This term is often used interchangeably with aorist aspect. This is not to be confused with the perfect tense. 

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