The phrase "a growing discrepancy between" is correct and usable in written English.
It can be used to describe an increasing difference or inconsistency between two or more things, often in contexts such as data analysis, social issues, or comparisons.
Example: "There is a growing discrepancy between the reported income levels and the actual living conditions of the population."
Alternatives: "an increasing gap between" or "a widening difference between".
Support given to workers, especially those on the front line of humanitarian work, is regularly thought of as lax, and there is a growing discrepancy between senior pay and the rest.
In the most recent edition of Science magazine a group of Brazilian scientists warned there was a growing discrepancy between the positive role played by the country's diplomats at UN climate talks, and the increasingly destructive direction of legislation and infrastructure projects that do not adequately balance environmental and social costs with the economic benefits.
Hermione is angry and heartbroken at their churlish sneering, and Emma Watson's gutsy, confident performance nicely shows that inside and outside the world of magic there is a growing discrepancy between a teenage girl's status and her accelerating emotional and intellectual development.
"Last week we noticed a growing discrepancy between our Google Analytics and Quantcast numbers.
Over recent years, utilities supplying the residential electricity sector have struggled with a growing discrepancy between revenues and costs.
A growing discrepancy between the number of patients awaiting liver transplantation and the number of organs available mandates the use of even marginal organ donors in whom there is major risk of suboptimal graft function.
When the Kovalchuk deal was announced Monday, the Web site for The Star-Ledger newspaper (NJ.com) ran side-by-side headlines that highlighted the growing discrepancy between the real world and the sports world.
However, the traditional idea of the "Franco-German motor essential to the advancement of Europe" is losing credibility with the growing discrepancy between the two economies, the widening differences in national interests, and the weakening of political will to build Europe together.
