Timing

Phaser 3
1

How do I run a function after a certain amount of time has passed?
please don’t send an example please provide code
thanks,

2 
var timedEvent = this.time.addEvent({
        delay: gameOptions.changeTime,
        callback: this.changeSpeed,
        callbackScope: this,
        loop: true,
    });
3

How will this fire a function? also where would I put this bit of code create() or update()

4

var timedEvent = this.time.addEvent({
delay: “you time”,
callback: "your function”,
callbackScope: this,
loop: true,
});

put it to create()