date vs epoch

date

noun
  • A specific day in time at which a transaction or event takes place, or is appointed to take place; a given point of time. 

  • The date palm. 

  • The addition to a writing, inscription, coin, etc., which specifies the time (especially the day, month, and year) when the writing or inscription was given, executed, or made. 

  • A romantic meeting or outing with a lover or potential lover, or the person so met. 

  • One's companion for social activities or occasions. 

  • A pre-arranged meeting. 

  • The fruit of the date palm, Phoenix dactylifera, somewhat in the shape of an olive, containing a soft, sweet pulp and enclosing a hard kernel. 

  • A point in time. 

  • Assigned end; conclusion. 

verb
  • To have a steady relationship with; to be romantically involved with. 

  • To determine the age of something. 

  • To note the time or place of writing or executing; to express in an instrument the time of its execution. 

  • To take (someone) on a date, or a series of dates. 

  • To have a steady relationship with each other; to be romantically involved with each other. 

  • To have beginning; to begin; to be dated or reckoned. 

  • To make or become old, especially in such a way as to fall out of fashion, become less appealing or attractive, etc. 

  • To note or fix the time of (an event); to give the date of. 

epoch

noun
  • A specific instant in time, chosen as the point of reference or zero value of a system that involves identifying instants of time. 

  • A geochronologic unit of hundreds of thousands to millions of years; a subdivision of a period, and subdivided into ages (or sometimes subepochs). 

  • A particular period of history, or of a person's life, especially one considered noteworthy or remarkable. 

  • A notable event which marks the beginning of such a period. 

  • One complete presentation of the training data set to an iterative machine learning algorithm. 

verb
  • To divide (data) into segments by time period. 

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