The phrase "a heavy effort" is correct and usable in written English.
It can be used to describe a significant amount of work or exertion put into a task or project.
Example: "Completing the project on time required a heavy effort from the entire team."
Alternatives: "a considerable effort" or "a substantial effort."
That repeal -- the result of a heavy lobbying effort by the financial industry and signed by President Bill Clinton -- triggered the orgy of speculation that eventually led to the Wall Street meltdown in 2008.
Collectively, Acari exhibit all these features and so a heavy sampling effort will be necessary to reliably use mt genomics in mite phylogenetic studies.
But critics say the Pulpín law is a heavy-handed effort to exploit the young.
Many Senate Republicans were outraged by the subpoena, calling it a heavy-handed effort at intimidation.
His bosses, Kalpona Akter and Babul Akhter, were arrested and accused of inciting worker riots, charges they denied and interpreted as a heavy-handed effort to shut down their organizing.
The summary infuriated some delegates from wealthier countries, who saw a heavy-handed effort to impede plans for an unfettered trading system that would allow one country to get credit toward emissions goals for investing in cleaner power plants or other new technologies abroad.
"It's going to be a heavy-duty effort for us to do this right.
He hopes he won't have to for some time to come, because when a tall jockey begins to get heavy efforts to reduce are pretty futile.
Originally a torpid, emotion-heavy effort from Bowie's 2013 album The Next Day, Murphy transformed the track into a 10-minute expedition that matches Bowie's best work in winking danciness and high-minded concepts (he calls this the "Hello Steve Reich Mix").
Meanwhile, the company has begun heavy efforts independently of Oculus to define what social interaction looks like on early virtual reality systems.
