‘Revision’ might be countable or uncountable. I am a little bit confused.
Answer
When revision means a change, it can be countable, as in make a few revisions to a report.
When it means examining something so it can be changed, then it can be both:
a system in need of revision AND a revision of standards.
Finally, when it means learning for an exam, it is always uncountable.
Attribution
Source : Link , Question Author : lukas , Answer Author : Irene