Question

how did Frederick Williams describe, the 360 century

Answer 1

He did not give any description about the 360 century, he just discussed the evidence presented by others 

Answer 2

Fredrick william described and provided with an evidence that some of the ancient civilisations sch as mayan or indonesian civilisation used the 360 days calendar he then investigated why was it used and he came to know that it was used for speeding up the earths rotation of our earth and at hat time in historical times could add 5.24 days to the year