"assiduous study" is a correct and usable phrase in written English.
It means diligent and persistent effort in learning or studying. Example: His excellent grades were a result of his assiduous study and dedication to his studies.
His assiduous study of opposing teams and players kept Riley competitive even as his speed and quickness diminished.
Cage the Elephant The Kentucky rockers really went for it, but singer Matthew Shultz's assiduous study of Jim Morrison's 1960s school of rock theatrics felt forced.
After Wolf's death, in 2011, Raja wrote a short essay to commemorate her dear friend, inspiration, and mentor: The assiduous study of the words of an author generates affinity, closeness.
Any sense of real break with the past was mitigated by continued adherence to purity laws (dietary and bodily) and by assiduous study of Scripture, including the legal elements that historical developments had now made inoperable.
And when Brady was told that Branch had described him as a dork because of his assiduous study habits, Brady finally seemed off balance for the first time this season.
Aristotle's own preferred alternative, that there are first principles of the sciences graspable by those willing to engage in assiduous study, has caused consternation in many of his readers.
Centuries of assiduous studies by earthbound observers, extended by spacecraft observations since the 1960s, have revealed that Mars is similar to Earth in many ways.
But the composer's assiduous studies of Southern culture and, more important, his restless investigations into the European avant-garde take him, for better or worse, beyond the aspirations of an Irving Berlin or Jerome Kern.
She told them they were sending a little girl to her death (I was just out of elementary school); and though my mother wept with guilt in secret, she protected me from their discord, determined that I have the experience I'd anticipated for two years, a reward for assiduous language study.
He acquired his humanistic education by assiduous work under unfavourable conditions.
Assiduous work has been undertaken by Dov Noy of Hebrew University in Jerusalem, aided by enthusiastic amateurs throughout the country.
