What's the difference between duodenary and senary?

Duodenary

Definition:

• (a.) Containing twelve; twelvefold; increasing by twelves; duodecimal.

Example Sentences:

Senary

Definition:

• (a.) Of six; belonging to six; containing six.

Example Sentences:

• (1) (In view of recent evidence of the specific requirement of two cations, the complex is accurately described as senary).