Ordinal

Some countries use ordinal numbers to count millennia, whereas others count them using cardinal numbers.

Eight hundredth, nine hundredth and one thousandth are ordinal numbers.

One is a cardinal number; first is an ordinal number.

"Three" is a cardinal number, while "third" is the corresponding ordinal number.

The most common numerals in Latin, as in English, are the "cardinals"[…]and the "ordinals"[…]