What is the access time in Unix

Question

I want to know what access time is. I searched in the web but got the same definition:

read - gets changed

I know with touch

Answer 1

the average time between a request for information stored in a particular component such as the hard derive or RAM and it's delivery. On the other word time between when a read request and when the desired word comes. For example 235,288 units/ 13,82 transactions = 16.8 units per transaction.