Christianity describes ten plagues of Egypt: (a) water into blood, (b) frogs, (c) lice, (d) mixture of wild animals or flies, (e) diseased livestock, (f) boils, (g) thunderstorm of hail and fire, (h) locusts, (i) darkness for three days, and (j) death of firstborn.
In contrast, the Qur'an says:
So We sent upon them the flood and locusts and lice and frogs and blood as distinct signs, but they were arrogant and were a criminal people.
This difference motivates the question:
Question: Does Qur'an 7:133 imply there were five plagues of Egypt?
Qur'an 17:101 says We had certainly given Moses nine evident signs, but it seems likely this also includes miracles like his glowing hand and his staff.
In the context of Prophet Musa, we also have:
So each We seized for his sin; and among them were those upon whom We sent a storm of stones, and among them were those who were seized by the blast [from the sky], and among them were those whom We caused the earth to swallow, and among them were those whom We drowned. And Allah would not have wronged them, but it was they who were wronging themselves.
Some (or all) of them don't seem like "plagues" (which would ordinarily be interpreted as a widespread catastrophe). They seem more localized and targeted. I'm not sure if these count.