[{"name":"abcdef","address":"ghijk","reli":"A","prov":"a",},{"name":"xyz","address":"vwz","reli":"B","prov":"b",},{"name":"qwe","address":"rty","reli":"C","prov":"c",},{"name":"abcdef","address":"ghijk","reli":"A","prov":"a",},{"name":"hat","address":"ate","reli":"C","prov":"c",},]

db.collection.aggregate([{$facet:{"reli":[{$group:{_id:"$reli",v:{$sum:1}}},{$project:{v:1,k:"$_id",_id:0}},],"prov":[{$group:{_id:"$prov",v:{$sum:1}}},{$project:{v:1,k:"$_id",_id:0}},]}},{$project:{prov:{"$arrayToObject":"$prov"},reli:{"$arrayToObject":"$reli"}}}])