The phrase "aggressive hours" is correct and usable in written English.
It can be used to describe a time period that is particularly intense or demanding, often in a work or competitive context.
Example: "During the project deadline, we experienced aggressive hours that pushed our team to work overtime."
Alternatives: "intense hours" or "demanding hours".
The Proposed Regulations are far-ranging in scope, including not only specific technical safeguards but also requirements regarding governance, incident planning, data management and system testing, and an aggressive 72-hour time frame to notify DFS of certain cyber incidents.
Prime Minister Mahathir Mohamad opened the annual meeting of his party, the United Malays National Organization, with an aggressive two-hour speech that criticized the largest opposition party, the foreign press, foreign traders and major lending institutions.
The U.S. firm landed in Singapore, its first market in Southeast Asia, in July initially offering Prime Now, its e-commerce service with an aggressive two-hour delivery window.
The Amazon apps went live in Singapore early last night local time, and Prime Now — an aggressive two-hour delivery service — is available to Singapore's population of more than five million people from today.
I agreed -- and was the subject of an aggressive one-hour interview on camera in my office, the footage for possible use in the upcoming CNN segment.
It was a pretty aggressive 18-hour shoot, so you have to be super focused, but of course nerves went differently when working with strangers.
With Amazon's aggressive one-hour service, B&M merchants are feeling the heat, but instead of deciding they can no longer compete, they should fully utilize some tricks they still have up their sleeves.
His reputation is for extremely long hours, aggressive campaigning and a reliable pessimism that plays well with the local media.
But after five years of long hours, aggressive bosses and sky-high targets, he found himself in his doctor's surgery admitting he could no longer cope.
Instead the speech, which his campaign billed as a major policy address, represented an abrupt reversion to an aggressive tone just hours after an unfamiliar conciliatory timbre in Mexico City, where Trump met President Enrique Peña Nieto.
