Learn how to say Epochs correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word epoch:
a particular period of time in history or a person’s life:
the Victorian epoch
the beginning of a period in the history of someone or something:
these events marked an epoch in their history
Geology a division of time that is a subdivision of a period and is itself subdivided into ages, corresponding to a series in chronostratigraphy:
the Pliocene epoch
Astronomy an arbitrarily fixed date relative to which planetary or stellar measurements are expressed.
early 17th century (in the Latin form epocha; originally in the general sense of a date from which succeeding years are numbered): from modern Latin epocha, from Greek epokhē ‘stoppage, fixed point of time’, from epekhein ‘stop, take up a position’, from epi ‘upon, near to’ + ekhein ‘stay, be in a certain state’