"quarterly" in the noun sense
a periodical that is published every quarter (or four issues per year)
"quarterly" in the adjective sense
of or relating to or consisting of a quarter
"quarterly" in the adverb sense
in diagonally opposed quarters of an escutcheon
"two coats of arms borne quarterly"
2. quarterly, every quarter
in three month intervals
"interest is compounded quarterly"
Source: WordNet® (An amazing lexical database of English)
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