'Standby' in the Bible

And I will ask the Father, and He will give you another Helper (Comforter, Advocate, Intercessor—Counselor, Strengthener, Standby), to be with you forever—

But the Helper (Comforter, Advocate, Intercessor—Counselor, Strengthener, Standby), the Holy Spirit, whom the Father will send in My name [in My place, to represent Me and act on My behalf], He will teach you all things. And He will help you remember everything that I have told you.

“But when the Helper (Comforter, Advocate, Intercessor—Counselor, Strengthener, Standby) comes, whom I will send to you from the Father, that is the Spirit of Truth who comes from the Father, He will testify and bear witness about Me.

But I tell you the truth, it is to your advantage that I go away; for if I do not go away, the Helper (Comforter, Advocate, Intercessor—Counselor, Strengthener, Standby) will not come to you; but if I go, I will send Him (the Holy Spirit) to you [to be in close fellowship with you].