Another word for number

In 1916, the number of cases just in New York City was reported to be nine thousand.
To me, that's problem number one.
In peacetime it is only necessary to billet troops in the villages of any district and the number of fires in that district immediately increases.
A great number of people crowded in front of the conflagration.
After marching through a number of streets the patrol arrested five more Russian suspects: a small shopkeeper, two seminary students, a peasant, and a house serf, besides several looters.