The amount of time it takes the Earth to revolve once around the Sun (about 365 days) is called a year.
(The amount of time; to revolve; T:once; around the Sun) (The amount of time it takes the Earth to revolve once around the Sun (about 365 days); is called; a year)
The amount of time The amount of time it takes the Earth to revolve once around the Sun (about 365 days)
to revolve is called
T:once around the Sun
a year