Hi Bharath,
Defention is as follows as per 38 213
If a UE determines that a control resource set for Type0-PDCCH common search space is present, as described in Subclause 4.1, the UE determines a number of consecutive resource blocks and a number of consecutive symbols for the control resource set of the Type0-PDCCH common search space from the four most significant bits of RMSI-PDCCH-Config as described in Tables 13-1 through 13-10 and determines PDCCH monitoring occasions from the four least significant bits of RMSI-PDCCH-Config, included in MasterInformationBlock, as described in Tables 13-11 through 13-15