"seconds head start" is correct and usable in written English.
You can use it to refer to a brief period of time when someone has a slight advantage over others. For example, "Peter got a five seconds head start in the race, which gave him the edge he needed to win."
By the time of the final event, the 800m, she had the equivalent of a six-second head start over her nearest rival, Nadine Broersen.
When Jared Allen, a defensive end for the Minnesota Vikings, got a split-second head start on his way to a sack of Jacksonville quarterback Blaine Gabbert in the first week of the N.F.L. season, it highlighted more than just the Jaguars' belief that the play should have been blown dead before Allen smashed Gabbert to the ground.
How do you get past the design problem that defenders need a 45-second head start to build their castle before the attackers try to kick it over?
The intention was to make a film that isn't funny but might be amusing, to have a script that sounds like the characters have been given a 10 second head start to prepare what they will say, but even then they get it wrong.
Nate had arrived at school -- among the first Head Start centers in the nation to administer the test -- with an eager smile that morning.
Noble pursuits both, I have to say, but it takes longer for me to type than it takes him to whine, even if I do have a four minute and 11 second head start.
Biathlon – women's pursuit Women's sprint gold medalist Anastasiya Kuzmina of Slovakia is a favorite in this event, after getting a 19.9-second head start for winning Sunday's sprint competition.
Darren Walker was born in a charity hospital in Lafayette, La., and grew up in the 1960s in a single-parent household in rural Texas, where his mother worked as a nurse's aide and he was enrolled in one of the first Head Start programs.
And I'm guessing that containing a tantruming package of fury might be difficult when you're strapped to a plank, not least because the time taken to undo your bindings gives the kid a five second head start when they do a runner.
