Biweekly (and probably semi-weekly) is one of those words that should be generally avoided. It's like depending on some less obvious operator precedence rule rather than parentheses. You may be technically correct, but you shouldn't do it that way because others will misunderstand you.
ADDED: I'm genuinely confused why people would disagree with this (which is in multiple style guides). I assume it's some variant of I know what it really means and, if someone else doesn't, that's their problem. But that seems antithetical to writing to communicate something to an audience.
Yes, comprised/utilize doesn't really matter because you will know from context, but biweekly is really tricky. For example "we have biweekly sprint ceremonies on monday and friday" can be very confusing.
ADDED: I'm genuinely confused why people would disagree with this (which is in multiple style guides). I assume it's some variant of I know what it really means and, if someone else doesn't, that's their problem. But that seems antithetical to writing to communicate something to an audience.