The phrase 'becoming by' is not grammatically correct and is not usable in written English.
If you are trying to express that something was completed, you might consider using phrases such as 'accomplished by', 'carried out by', 'completed by', etc. For example: The project was accomplished by the team in less than six months.
The journalist then wondered why the singer would be willing to devote time and energy to becoming, by his own reckoning, a second-tier actor, when his band had the potential to become one of the most important groups in the history of rock 'n' roll.
Not unnaturally, she grew bitter, to the point of becoming, by most accounts, a monster.
He also began collecting oil paintings, becoming by most accounts the biggest collector in China today.
As R&B changed, becoming by a distance the most sonically adventurous mainstream genre, Houston changed with it.
The only problem, from a marketing perspective, was that America was becoming, by any measure, a less dangerous place.
Steffani studied music in Venice, Rome, and Munich, where he served the Elector of Bavaria from 1667 to 1688, becoming by 1681 director of chamber music.
The sawfish's large size and comb makes them particularly prone to becoming by-catch in gillnets and trawl nets from fishermen.
It was, for him, "the deepest moment of authenticity so far, which I can very easily betray by becoming distracted, by becoming caught up in some game".
His certification as a GAL was achieved by taking courses and becoming certified by an examination.
In the second premiere, "... becoming... ...... by Shih-Hui Chen, Ms. Wincenc alternated among flute, alto flute and piccolo in lyrical phrases that gradually grew richer during the 11-minute work.
BECOMING FREUD, by Adam Phillips (Yale).
