variation
noun
uk/ˌveəriˈeɪʃən/ us [ C or U ]
a change in the amount or level of something:
Unemployment rates for individual counties are not adjusted for seasonal variations.
variation in sth The company uses outsourcing to respond to variations in demand.
[ C ]
something which is slightly different from the usual form or arrangement:
a variation on sth Sometimes a small variation on an existing idea is enough to make it stand out.