[{"_id":2,"client":"Some Client","type":"Some Type","firstUsed":"2021-01-05T13:23:37.000+0000","lastUsed":"2021-05-05T18:11:23.000+0000",},{"_id":3,"client":"Some Client","type":"Some Type2","firstUsed":"2021-01-06T13:23:37.000+0000","lastUsed":"2021-05-06T18:11:23.000+0000",},{"_id":4,"client":"Some Client","type":"Some Type","firstUsed":"2021-01-07T13:23:37.000+0000","lastUsed":"2021-05-07T18:11:23.000+0000",},{"_id":5,"client":"Some Client","type":"Some Type","firstUsed":"2021-01-08T13:23:37.000+0000","lastUsed":"2021-05-08T18:11:23.000+0000",},]

db.collection.aggregate([{$group:{_id:"$type",firstUsed:{$min:"$firstUsed"},lastUsed:{$max:"$lastUsed"},}}])