The phrase "constant interaction" is correct and can be used in written English.
Example: In order to improve language skills, constant interaction with native speakers is essential.
"That constant interaction is not only beneficial psychologically but directly to our physical health".
Unlike most language classes, with their reliance on rote memorization, Duolingo offers constant interaction.
Embracing the modern sport fan's need for constant interaction, organisers went large on digital media too.
Because November Project workouts keep participants together in the same space, there's constant interaction.
It works because it permits the many to engage and share with the many, billions of actors in constant interaction.
Indeed, a central assumption of the systems view is that the individual and the environment are in constant interaction.
And yet, education requires constant interaction in which professor and students are fully present for an exchange.
They focused on signals commonly known as seismic noise, the result of constant interaction between ocean swell and "solid" earth.
But the constant interaction with electronic devices has made single-tasking seem boring or even unproductive.
All animal training and handling is based on constant interaction, daily routines and nurturing, reinforcing the trust and affection shared between the animals and people.
"The hermit faces this question," he writes: "Can one stand living with oneself?" It's a question he's spared, thanks to constant interaction with others.
