The phrase "after diligently" is correct and usable in written English.
It can be used to indicate that something is done following a period of careful and persistent effort.
Example: "After diligently researching the topic, she was able to present a well-informed argument."
Alternatives: "following thorough" or "after careful".
After diligently guiding her through the set menu of teen romance – dinner, the movies, a fumbled fuck in the back of his sedan – Hugh reveals an ulterior motive.
We as faculty must advocate that our university never compromise on its mission to foster the free exchange of ideas and teach students to make informed decisions after diligently gathering facts.
If you read just the first 10 or 15 pages, you might think that ResCap ended up in bankruptcy after diligently agreeing to lots of loan modifications and originating nothing but conforming loans.
Airlines After diligently searching discount online air-fare sites, I found the best price on a round-trip ticket from Miami to Panama City ($422) on American Airlines' own Web site, www.aa.com.
After diligently growing Samsung Mulsan, Lee was forced to abandon his holdings in Seoul when the city was invaded and occupied by the republic's communist neighbors to the north.
But Sheriff are still scampering after them diligently, preventing any further breakthrough.
"We have lots of these opportunities and we are going after them diligently," Citigroup's chief executive, Vikram S. Pandit, said in a conference call with investors.
One was the academic criminologist Phil Scraton, who spent decade after decade diligently compiling the detailed evidence that has so shocked the nation in recent days.
Just one complaint: After searching diligently and long for Al Fontego dei Pescaori, we were told by a local resident that it was closed for the week.
She looked after us diligently".
Luckily I'm a member of Metafilter, and so my first recourse was to go to Ask Mefi and put up the question — after searching diligently for dupes, of course.
