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twice
biannually means twice a year
He is interested.
meaning: "not twice for the same".
twice
you turn the right side twice
A repetative Task as in being done twice.
Double or twice
It is used for both senses, but the proper meaning is twice a week.
Bimonthly is a term meaning 'twice per month'.
Biannual Bi meaning 2 and annual meaning yearly
let the no. of brothers be 'x' then twice as many sisters as brothers means 2(x) = 2x its as simple as that!