The English word for the century is century, but age was used in the ice age.

The Chinese word "century" has two concepts:

From AD, every 100 year is a century, which is the concept of English century.

The concept of "time" in the evolution and development of the earth, that is, a specific historical period with certain characteristics, has a development stage of several decades to hundreds of thousands of years from beginning to end. This beginning and end stage means age in English.