some clarification about CM & CG

[amorist hrid]

i used to think CM as chances made...but recently i saw some curious fact, 1 of my keepers who i signed recently and is yet to play has 1 under CM and it made me think what i know is not accurate...so i'm willing to know what is correct??

CM - chances made / chances per minutes / ?
CG - chances of goal / goal chance created per minutes / ?

is it something i'm missing or something among these...i looked for an answer but don't seem to find one....can anyone clarify it??