The phrase 'vast knowledge about' is correct and usable in written English.
This phrase can be used to refer to a person's understanding of a particular subject or topic. For example, "Jane has a vast knowledge about Ancient Greek literature."
However, in 2013, such metadata can provide authorities with vast knowledge about a caller's identity.
He started out as a "tie-boy" at age 8, sewing up sacks, and accumulated vast knowledge about Southern grains.
Mr. Keegan's vast knowledge about the history of war ornaments "The American Civil War," but it can lead to pedantic asides.
She and her staff are very welcoming and eager to share their vast knowledge about what to see and do in town.
Surprisingly little is known about the time course of memory recall, considering our vast knowledge about the information processing hierarchy during visual perception.
In a statement, Mr. Greenspan called Mr. Winn "a gentle man of great humor whose vast knowledge about Congressional and legislative issues has proven invaluable to the board and the entire Federal Reserve System".
Outwardly, there is nothing about him that would reveal the vast knowledge he holds about botany.
This is proven by the vast knowledge of parents about led‐related issues, however, the follow up activities (i.e. treatment) have lagged behind due to the socio‐economic situation of RAE communities in Osterode and the overall situation of these communities.
We have also seen companies use technology to promise, at the prick of a finger or drop of saliva, vast knowledge of, and answers about, our health.
When compared to the vast knowledge pertaining to adults with IBS, very little is known about IBS in the adolescent population.
Recent research about grievers who are termed "resilient grievers" adds to our vast knowledge of grief and grieving.
