What is 4 in below statement?

system-design
Tags: #<Tag:0x00007f18286645f8>

#1

CPU time available for 23k queries : 1 second * 4 = 4 seconds


#2

I think it is a number of CPU units/cores


#3

It is number of core. So let say if there are 4 core then

1 Second = 1000 mili second = 1000*1000 micro second.

Total 4 cores: 4* (1000*1000)