"diminishing amount" is a correct and usable phrase in written English.
It is typically used to describe a decreasing or reducing quantity. Example: The company's profits have been steadily declining due to a diminishing amount of sales.
So we have a diminishing amount going into the black.
As the product matures, becoming more standardized and better known, a diminishing amount of specialized knowledge is needed to sell it.
In the aftermath of the 2008 recession, everybody was looking for ways to save and generally be smarter about using the diminishing amount of what they had.
The market malfunctions have been assigned part of the blame for the diminishing amount of trading happening on the nation's stock exchanges.
The popularity of meal replacement drinks has been surging in the United States over the past few years, driven by the obesity epidemic and Americans' diminishing amount of leisure time, according to market research firm CB Insights.
Nursing home care will represent a diminishing amount of long-term care over all, with retirement communities, assisted living and home- and community-based options becoming more attractive alternatives.
But under the new arrangement, the county will pay $26 million to support the hospital in 1999, then diminishing amounts for the next seven years until that support hits zero, Alan D. Scheinkman, the county attorney, said.
It claims the increases are designed to force patients to make up for diminishing amounts of government funding for dentistry – down £170m in England since 2010-11, from £2.2bn to £2.03bn.
Menopause, Wilson argued, was not a natural age-related condition; it was an illness, akin to diabetes or kidney failure, and one that could be treated by taking estrogen to replace the hormones that a woman's ovaries secreted in ever diminishing amounts.
David Simmonds, representing the Local Government Association, cautioned that local authorities had diminishing amounts of direct control over schools - because of central government directives and targets and the shift towards academies.
To examine the effect of the quantity of nucleating agent, we chose one crystallization condition (lysozyme/dried seaweed, condition D3: 0.1 M Hepes (pH 7.5), 2% PEG 400, 2 M ammonium sulfate) and set up drops with diminishing amounts of nucleant (6 replicate drops for each amount of nucleant).
