How can I disable a trigger after the actions follow through?

[Revengez]

I made a chat command, if you say Frog it kills this little frog in front of you, and then spawns a large frog item. If you pickup the frog item it teleports you to this region. I'd like to make it so the first time you say frog the trigger disables.

 

[AceHart]

Trigger - Turn OFF (This trigger)

 

[Nherwyziant]

Trigger - Turn off (This trigger)

 

[Revengez]

Thanks much.