rate
one measured against another quantity;
a fixed price paid or charged for something;
consider to be of a certain quality or standard
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measure
exchange rate
(between currencies)
frequency
the rate at which something occurs
over a particular period of time
interest
money paid regularly
at a particular rate
speed
velocity
the rate at which someone or
something moves or operates
best
first-rate
number one
of the most excellent or
desirable type or quality