According to Macmillan Dictionary, the noun 'use' can be both countable and uncountable. How to understand whether it is countable or uncountable in a given context?
Here're some examples I saw that could be used with either of the determiners given in square brackets, and the choice really depend on whether 'use' there is a mass noun:
There is a clear correlation between [the/a/-] use of electrical appliances and time spent on household chores.
[The/a/-] use of email has increased.
I suspect '… how to decide…' is what you wanted, but that's not the same thing.
– Robbie Goodwin Oct 06 '22 at 23:05Statistically, there might well be a clear correlation between electrical appliances and time spent on household chores but how could that matter?
'The' use of email might have increased. To you, what might 'a' use mean?
– Robbie Goodwin Oct 12 '22 at 21:54