The phrase "a constant element of" is correct and usable in written English.
It can be used to describe something that is consistently present or a recurring feature in a particular context.
Example: "In her life, family has always been a constant element of support and encouragement."
Alternatives: "a consistent factor in" or "an enduring aspect of".
It is Hobsbawm's self-questioning that gives this book a constant element of surprise and vigour and makes it an exceptional political memoir.
Fuel costs, which typically make up 25 percent to 35 percent of airlines' operating costs, also represent a constant element of uncertainty.
The battle between Islamists and Western-oriented liberals is a constant element of political life in this diverse society, which includes desert Bedouins, devout Shiites and a large, urban and mostly Sunni elite with a taste for luxurious mansions and European vacations.
The Fourth Axillary sclerite is not a constant element of the wing base.
In contrast to M. myotis, which first appeared in Central Europe in the Late Holocene, M. bechsteinii has been a constant element of the Mid-European interglacial communities since Early Pliocene.
This is what gives surfing a constant element of interest.
These complex evolutionary lines of the Italian production system have always had a constant element: the support of the credit system.
In "Cage Eleven," his collection of prison essays, Adams understands his "whack" at Long Kesh to be part of his legacy: Almost twenty years have passed since Long Kesh was opened and through the years it has been a constant element in the lives of all the members of my family.
If there is no proposition expressed in normal predicative uses of moral expressions we eliminate one candidate for a constant element that generates relations of implication with other expressions embedding the same form of words.
Early reflections, in particular from the ground (again a constant element in ecological environments of terrestrial animals), produce interferences with the direct sound that result in large frequency-dependent variations of ITD, especially at low frequencies (Gourévitch and Brette, 2012).
It is this constant element of paradox in all the nuclear strategies and in the conventional attitudes toward them that Kubrick transformed into the principal theme of "Dr. Strangelove".
