From a big list with duplicates, isolating records with certain criteria and counting

[RA_gov]

From TABLE1 containing all banks and their custodians, I need a DAX query(s) that isolates only BANK_NAME where CUSTODIAN_NAME = 'CUSTODIAN' ... and from that listing, shows me counts for all their other custodians.

Restults would look like:

COLORADO BANK    1

MIDWAY BANK           3

UNION BANK                0

Thanks for the help!

RA

TABLE1

BANK_NAME	CUSTODIAN_NAME
UNION BANK	BUSINESS A
COMMUNITY BANK	BUSINESS BB
COLORADO BANK	CUSTODIAN
COLORADO BANK	BUSINESS A
STANDARD BANK	BUSINESS CCC
STANDARD BANK	BUSINESS BB
DOVETAIL S&L	BUSINESS A
MIDWAY BANK	BUSINESS BB
MIDWAY BANK	BUSINESS A
MIDWAY BANK	BUSINESS CCC
MIDWAY BANK	CUSTODIAN
UNION BANK	CUSTODIAN
HAWAII BANK	BUSINESS CCC
FIRST BANK	BUSINESS CCC