"constant balance" is correct and usable in written English.
It is an idiomatic phrase that means to maintain equilibrium, or to keep something in balance. For example, "Successful businesses require a constant balance between maximizing profits and minimizing costs".
But the season is a constant balance of cheer and dread.
With a $5,000 constant balance, by the end of the year you could accumulate 50 cents in interest.
The constant balance that needs to be struck, she said, is between monitoring dangers without alienating allies in the community, as happened with New York City Police Department's polarizing surveillance of mosques.
A key appeal of the game is its taut fuel system: you need the stuff both to fly and to recharge your shields, so there's a constant balance going on as it slowly runs down.
There is a constant balance to be struck between blaming defeats on bad luck — as he used to do, most recently two years ago after losing the British Open at Carnoustie — or on himself, as he did last year after making bogeys on two of the final three holes to lose the P.G.A. Championship.
"That is the constant balance we have on something like the Alderney-Southampton route.
Pakistan had constant balance-of-payments crises, whereas India was a rare suppliant at the IMF.
It is an imposing and constant balancing act for her.
Ms. Ziskin said film producing was a constant balancing of artistic and commercial concerns.
Her glamorous aunt, Hala, always hurts a few other people in a constant balancing act between survival and self-destruction.
Peace in Iraq has to be built on a Shiite-Sunni consensus, not a constant balancing act by us.
