Year by year there has been an increase in violence shown in the movies and on TV.
Related vocabulary: day by day, week by week, month by month
year by year
Yearly; on a yearly basis. Our subscriber base has grown year by year, and we're nearly at our target.Year by year I find myself becoming less interested in nightlife and more focused on enjoying the outdoors.
ˌyear by ˈyear
as the years pass; each year: Year by year their affection for each other grew stronger.