1 time all other occasion there are multiples of nine (9)
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There are 2704 of them between 1000 and 10000 inclusive.
I count 53 times.
ten times
400 times.
There will be unlimited 0's between 1 and 10000 because you also need to count the 0's, such as 1.01, 5934.00000000000004.... etc. Well, there could be an actual number of the digit 0 appear between 1 and 10000, but that number will be so much times larger than a google.