I have model of Schedule

const scheduleSchema = new mongoose.Schema({
    group:{
        type:mongoose.Schema.Types.ObjectId,
        required:true,
        ref: "Group"
    },
    finalCourse:{
        teacher:{
          type:mongoose.Schema.Types.ObjectId,
          required:true,
          ref: "Teacher"
         },
    },
    extTeacher:{
        type:mongoose.Schema.Types.ObjectId,
        ref: "Teacher"
    },
    fromDate:{
        type:Date,
        required:true
    },
    toDate:{
        type:Date,
    },
    fromHour:{
        type:{
            hour:Number,
            minutes: Number
        },
    },
    toHour:{
        type:{
            hour:Number,
            minutes: Number
        },
    },
    fromHourInt:{
        type:Number
    },
    toHourInt:{
        type:Number
    },
    allDay:{
        type:Boolean
    },
    room:{
        type: mongoose.Schema.Types.ObjectId,
        ref: "Room"
    }
})

I want to find the conflicts between schedules
The conflict can be if the teacher is in same time in both schedules

for example teacher1 at 04/06/2024 12:00-16:00 in group1
and teacher1 at 04/06/2024 14:00-18:00 in group2

The conflict can be if the group is in same time in both schedules

for exmaple group1 at 04/06/2024 12:00-16:00 with teacher1
and group1 at 04/06/2024 12:00-16:00 with teacher2

What is the best way find the conflicts?
Thanks!