The phrase "a great depth of knowledge" is correct and usable in written English.
It can be used to describe someone who possesses extensive understanding or expertise in a particular subject or field.
Example: "Her success in the project was largely due to her great depth of knowledge in environmental science."
Alternatives: "a profound understanding" or "extensive expertise".
David could see three sides to everything, drawing on a great depth of knowledge, particularly history.
NT: We are very lucky that our chair of governors has a great depth of knowledge about how organisations and schools work.
Managers know that they will find a number of Ph.D. scientists who have the narrow technical skills they're looking for in specific opening, but they usually prefer to hire someone who has shown excellence in applying scientific skills rather than the Ph.D. who has a great depth of knowledge in a single technical area.
Rashid, though, is sailing close to the wind with his club and career: there are sceptics about, some with a greater depth of knowledge than most, and his card has been marked.
They know their classics with a greater depth of knowledge," Dunmore says of the crowd.
Williams would advise Obama to demonstrate that he has a greater depth of knowledge on the topic of foreign policy and shine a light on Romney's deficits.
(Health care consumer)" While this was the case generally, some health care consumers did report that pharmacists have a great depth of medication knowledge and might be a suitable alternative to a GP prescribing.
"Even if they may not have a great depth of familiarity and knowledge of the contemporary art scene, they have something far more important, which is curiosity and respect and interest.
The approach, he said, will give soldiers "great depth of knowledge, understanding, and much better intelligence access to the local people in those areas by owning, as it were, those chunks of territory".
As a teacher, he was deeply respected by students and colleagues alike for his gentle approach to teaching and his great depth of knowledge in all areas of the vocal arts.
