2 added 109 characters in body
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From Handbook of Technical Writing, 5th Edition (Brusaw, Alred, Oliu):

When used with periods of time, bi means "two" or "every two". Bimonthly means "once in two months"....When used with periods of time, semi means "half of" or "occurring twice within a period of time." Semimonthly means "twice a month".

I thought there was a note that said, "avoid this word because it is confusing," but that is not the case.

From Handbook of Technical Writing, 5th Edition (Brusaw, Alred, Oliu):

When used with periods of time, bi means "two" or "every two". Bimonthly means "once in two months"....When used with periods of time, semi means "half of" or "occurring twice within a period of time." Semimonthly means "twice a month".

From Handbook of Technical Writing, 5th Edition (Brusaw, Alred, Oliu):

When used with periods of time, bi means "two" or "every two". Bimonthly means "once in two months"....When used with periods of time, semi means "half of" or "occurring twice within a period of time." Semimonthly means "twice a month".

I thought there was a note that said, "avoid this word because it is confusing," but that is not the case.

1
source | link

From Handbook of Technical Writing, 5th Edition (Brusaw, Alred, Oliu):

When used with periods of time, bi means "two" or "every two". Bimonthly means "once in two months"....When used with periods of time, semi means "half of" or "occurring twice within a period of time." Semimonthly means "twice a month".