The phrase "a constant balance" is correct and usable in written English.
It can be used to describe a state of equilibrium that is maintained consistently over time.
Example: "In a successful relationship, communication is key to achieving a constant balance between both partners' needs."
Alternatives: "an ongoing equilibrium" or "a steady harmony."
But the season is a constant balance of cheer and dread.
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.
But it's a constant balance of how do you attract new users or bring back the old users.
In all of these areas a constant balance has to be made between the treatment necessary to destroy the tumor and the unnecessary exposure of healthy tissue.
She told The Hill in 2009 that her political philosophy involves "a constant balance of paying attention, asking questions and putting my money where my mouth is".
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.
Utilities perform a constant balancing act, matching the demand from its customers with its supply of power.
It's about being able to push forward the things we think do justice to the environment and it is a constant balancing act.
