mysterious numbers next to AP names in Time Graph

[PontiacCZ]

In Time Graph there are strange unexplained numbers displayed next to APs names. What is that? I expected to find these numbers in "Access Points" list so I could understand them but they are not there.

How about to add some sort of "help" to the "Time Graph" screen for users to understand what these numbers mean.

[Sharabaddin]

@PontiacCZ Example your first item "Machine 5G 36(42)" 36 - chanel, (42) - i dont now but I think it reserv chanel or chanel has before

[VREMSoftwareDevelopment]

These are primary and center channel, you can find them in Access Points, Channel Graph and Time Graph.
Explanation is available in FAQ section under "How channel graph displays 20/40/80/160 MHz channel width?" and issues #64 and #309.