Pagging rate
(computer science) The number of pages per second moved by virtual storage between main storage and the page data set.
When system is short on physical memory (RAM) it moves some "pages" from RAM to swap storage. When required it will read them back. This is called paging. Page is a unit of memory and is architecture dependent, but usually mean 4KB of RAM.
So paging rate is how fast the system is moving pages between RAM and swap in "pages per second" as unit.
I don't think you can read paging rate using this output. You may try to compare some subsequent outputs and count the result using the difference, but I'm not familiar with this output.