Read again ... what you posted actually does agree with me.
Semi-annual is twice in one year ... as is biannual.
Per your definition source:
BIANNUAL
Quote:
biannual
One entry found for biannual.
Main Entry: bi·an·nu·al
Pronunciation: (")bI-'an-y&(-w&)l
Function: adjective
1 : occurring twice a year |
Which is incorrect usage for the context of a flight review. As I stated above a flight review is BIENNIAL.
Per the M-W Dictionary:
Quote:
biennial
One entry found for biennial.
Main Entry: bi·en·ni·al
Pronunciation: (")bI-'e-nE-&l
Function: adjective
1 : occurring every two years |