A quarter is another way of saying one fourth, in this setting, one fourth of a year = three months.
Quarterly means something that happens every 3 months.
Quarterly is an adjective (quarterly bills) and an adverb (paid quarterly).
The Quarterly was created in 1987.
The Quarterly ended in 1995.
The plural form of quarterly is quarterlies.
Crozer Quarterly was created in 1924.
Quarterly Essay was created in 2001.
Linacre Quarterly was created in 1932.
Psychiatric Quarterly was created in 1927.
Police Quarterly was created in 1998.
Quarterly months are:OctoberJanuaryAprilJuly
Critical Quarterly was created in 1958.
The Cambridge Quarterly was created in 1966.