B1
an amount
Dictionary examples:
The number of times I've said 'um' in presentations is embarrassingly high. (0.0)
The number of times I've pretended to understand complicated words is countless. (0.0)
The number of pizza slices I ate is equal to my age! (0.0)
The number of people killed in road accidents fell last month. (25.0)
A small number of children are educated at home. (28.0)
A large number of people were contacted. (28.1)