I have a a question on the aircraft market

[wbmc1]

Pardon me if this is on the wiki/help site, but I wasnt able to find it. Basically on the user aircraft market, what do:
1) Age mean (If it says 11 does it mean 11 days,months, years?)
2) Cycles (Again what does it mean)
3) Airframe Hours (once again what does it mean)

Sorry if I asked an obvious question 

[CHR]

Age is in years. Cycles is the number of flights the plane has done. Airframe hours is the number of hours the plane has flown.
All of these are related to maintenance costs. However, the current formula only calculates maintenance based on age, so don't worry about the last two.

[wbmc1]

Oh ok thanks   

[StephenM]

Added the explanation to the Wiki under aircraft data.