brief, fleeting, mere (esp. AmE), split
I only saw the man for a split second as he ran past.
I swam to the other shore in mere seconds.

single
precious
She had wasted a few precious seconds.

closing, dying (BrE)
His goal in the dying seconds of the game secured Rangers a 3–2 victory.

take
This will only take a second.

have
Do you have a second, Miss White?

hang on, hold on, wait
Wait a second—this letter's been sent to me by mistake.

spend
She wanted to spend every second with him.

go by, pass, tick by
The seconds ticked by.

hand

for a second
For a second I thought you were my mother.
I hesitated for a second before speaking.

in a second
I'll be with you in a second.

in seconds, within seconds
Within seconds he had disappeared from view.

a couple of seconds
It took a couple of seconds to realize what was going on.

a fraction of a second
If he'd reacted a fraction of a second later, he would surely have died.

a matter of seconds
The end of the game is only a matter of seconds away.

count the seconds
I was counting the seconds until the bell.

in the final seconds
The game was lost in the final seconds.

(only) seconds left
We only have a few seconds left.
We were three points behind with only seconds left in the game.

with each passing second, with every passing second
The room seemed to grow hotter with each passing second.

Second is used with these nouns as the object:
motion