Mongodb Count multiple subobjects and group by - node.js

Question

Hello This query is running fine for me I want to add other arrays as well like contact and I want separate count for them. If I add contact it add the result in count P.S : I used array name with $sum it start showing me zero count
return Company.aggregate(
{"$unwind":"$agreement"},
{"$unwind":"$contact"},
{"$unwind":"$companySite"},
{ $group: { _id: {
"Organization": "$orgId",
"Company": "$name"
}, "count": { $sum: 1 } } },{
"$project": {
"_id": 0,
"Company": "$_id.Company",
"Organization":"$_id.Organization",
"Count": "$count"
}
})
expected output
"Company": "Multi-Metal Manufacturing",
"Organization": "1",
"AgreementCount": 1,
"ContactCount" : 4
"ABC Count": 5
Sample Document is :
{
"_id" : ObjectId("57c6a97a90c933a2d54117dc"),
"ITBCompanyId" : 1034,
"updatedAt" : ISODate("2016-08-31T12:47:03.679Z"),
"createdAt" : ISODate("2016-08-31T09:55:06.217Z"),
"identifier" : "INL10",
"name" : "Inline Data Systems",
"addressLine1" : "7 Park Place",
"addressLine2" : "Ste D",
"city" : "Swansea",
"orgId" : "1",
"deletedAt" : null,
"_info" : {
"lastUpdated" : ISODate("2016-02-10T21:22:15.000Z"),
"updatedBy" : "Clarissa"
},
"whois" : [],
"configuration" : [],
"contact" : [
{
"email" : "justin#inlinedatasystems.com",
"mobileGuid" : "d8852942-8f5a-406f-a646-a5f8697f7885",
"presence" : null,
"gender" : null,
"title" : null,
"country" : null,
"zip" : null,
"state" : null,
"city" : null,
"addressLine2" : null,
"addressLine1" : null,
"lastName" : "Wilkerson",
"firstName" : "Justin",
"id" : 191,
"_id" : ObjectId("57c6abdfb966968130b1671c"),
"communicationItems" : [],
"customFields" : null,
"company" : {
"name" : "Inline Data Systems",
"id" : "19331"
},
"relationship" : {
"name" : null,
"id" : 0
}
}
],
"agreement" : [
{
"periodType" : null,
"billAmount" : "0",
"billTermsId" : 12,
"billOneTimeFlag" : false,
"billCycleId" : "2",
"expiredDays" : "0"
},
{
"id" : "40",
"name" : "Managed Hosted Server Agreement",
"billAmount" : "0",
"periodType" : null,
"_id" : ObjectId("57c6ab96b966968130b16616"),
"_info" : {
"lastUpdated" : ISODate("2014-10-03T14:25:42.000Z"),
"updatedBy" : "ali "
},
"contact" : {
"id" : "191",
"name" : "Justin Wilkerson"
},
"agreementType" : {
"id" : "33",
"name" : "HDCloud - Hosted Server"
}
},
{
"id" : "41",
"name" : "Managed Backup Agreement",
"parentAgreementId" : "42",
"customerPO" : ""
}
],
"companySite" : [
{
"id" : 1037,
"name" : "Main",
"city" : "Swansea",
"state" : "IL",
"zip" : "62226",
}
]