Custom metric in CloudWatch

Question

How many requests per minute I can send for each custom metric in CloudWatch?

p.s. I know for standard metrics is 1 per minute.

Answer 1

Here's a quote from section Publishing Single Data Points within the Amazon CloudWatch Developer Guide:

Although you can publish data points with time stamps as granular as one-thousandth of a second, Amazon CloudWatch aggregates the data to a minimum granularity of one minute