How know if an index is used? - response (2) by mybudy

I would like to know how many time one index is used. In dbc.indicesv there is a column AccessCount , this colum is ok for this ?
I don't understand why have one secundary index with columns (nu_telef,cod_central) and the accesscount is : 29 for nu_telef and
3 for cod_central , and columnposition is 1 for cod_central and 2 for nu_telef
the accesscount should not be the same for both ? which is the number of access to the index, 29 or 3 ?

Thanks.