From Longman Dictionary of Contemporary Englishpassing days/weeks/years etcpassing days/weeks/years etcliteraryPASS/TIME PASSING the days, weeks, years etc that pass Her grief became less intense with the passing years. With each passing day she grew stronger. → passing
Examples from the Corpus
passing days/weeks/years etc• As a young woman, she was pretty, slender, and graceful and she remained so with the passing years.• Dent is a throwback to medieval times bypassed by modern progress, an anachronism that has survived the passing years.• Through the passing days, the biting cruelty of it all slowly healed, leaving only the scar tissue.• Over the passing years, time had been cruel to nearly everybody else.• Over the passing years, time had been kind to Caduta Massi.• The passing years took their toll, of course, and he did go into a decline when Grandmother died. 