[{"_id":"9917aed79fcc274bdefga","ticketId":101,"createdAt":ISODate("2021-11-07T08:34:39.697+00:00")},{"_id":"9917aed79fcc274bdefgkk","ticketId":101,"createdAt":ISODate("2021-11-07T08:34:39.697+00:00")},{"_id":"9917aed79fcc274bdefgb","ticketId":102,"createdAt":ISODate("2021-11-06T08:34:39.697+00:00")},{"_id":"9917aed79fcc274bdefgc","ticketId":103,"createdAt":ISODate("2021-11-05T08:34:39.697+00:00")},{"_id":"9917aed79fcc274bdefgd","ticketId":104,"createdAt":ISODate("2021-11-04T08:34:39.697+00:00")},{"_id":"9917aed79fcc274bdefge","ticketId":105,"createdAt":ISODate("2021-11-03T08:34:39.697+00:00")},{"_id":"9917aed79fcc274bdefgf","ticketId":106,"createdAt":ISODate("2021-11-02T08:34:39.697+00:00")},{"_id":"9917aed79fcc274bdefgg","ticketId":107,"createdAt":ISODate("2021-11-01T08:34:39.697+00:00")}]

db.collection.aggregate([{"$project":{"createdAtWeek":{"$week":"$createdAt"},"createdAtMonth":{"$month":"$createdAt"},"createdAtDay":{"$dayOfMonth":"$createdAt"}}},{"$group":{"_id":{createdAtWeek:"$createdAtWeek",createdAtMonth:"$createdAtMonth",createdAtDay:"$createdAtDay"},count:{$sum:1}}}])