decade vs epoch

decade

noun
  • A period of ten years , particularly such a period beginning with a year ending in 0 and ending with a year ending in 9. 

  • Any of the sets of ten sequential braille characters with predictable patterns. 

  • A group, set, or series of ten 

  • A period of ten days, (history) particularly those in the ancient Egyptian, Coptic, and French Revolutionary calendars. 

  • A series of prayers counted on a rosary, typically consisting of an Our Father, followed by ten Hail Marys, and concluding with a Glory Be and sometimes the Fatima Prayer. 

  • A set of resistors, capacitors, etc. connected so as to provide even increments between one and ten times a base electrical resistance. 

  • The interval between any two quantities having a ratio of 10 to 1. 

  • A set of ten electronic devices used to represent digits. 

epoch

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

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

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

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

  • 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 decade and epoch occurred in a corpus of books? (source: Google Ngram Viewer )