"main tendencies" is correct and usable in written English.
You can use it to refer to the overall trends or main patterns in any set of data or information. For example: "The main tendencies in the survey results suggest that most people are in favor of the policy change."
A major form of Hindu thought, Vedanta, includes two main tendencies: the monistic Advaita (Sanskrit: "Nondualism") and the theistic Vishishtadvaita ("Qualified Nondualism"), which emphasizes bhakti, or devotion.
This documentary exemplifies the two main tendencies in the year's best Australian films: it has the visual panache to work really well on the big screen, and it isn't set here.
Most importantly, the posters keenly track the main tendencies of modern art during the period, from the flowing silhouettes and organic imagery of Art Nouveau and Symbolism to the clean, minimal lines of Cubism and Constructivism.
The psychologist must study humanity from the historical or comparative standpoint, analyzing the elements that constitute the fabric of society, with its customs, its conventions, and the main tendencies of its evolution.
I believed that the problem we were facing wasn't a return to the Soviet Union, but rather the fact that Russia was once again finding its place in the capitalist world system, adapting, in its semi-peripheral way, the main tendencies of that system.
Still, some main tendencies can be observed.
Until then, the main tendency of his work had been surrealist".
In modern mosaic practice, the main tendency is to build on the unique and inimitable qualities of the medium.
Leonard Zeskind, a leading expert on the radical far right and author, says that today, "the main tendency of organisations is mainstreaming … The movement imperative is towards the Tea Parties, running for office, anti-immigrant mongering – not roadside bombs".
There are exceptions to the collection's main tendency: the purist abstraction of the painter Harvey Quaytman; the rather pat cerebrality of a sculpture by Bruce Nauman that looks slightly out of place here; and Jake Berthot's "Greenpoint," which proves that Brice Marden wasn't the only artist dedicated to moody monochromes in 1971.
The main tendency of a person's striving should be towards the total value of the life of that person (SOM: 49).
