Major bus corridor bus frequencies increase/decrease since 2008

[:D]

One I know of is Coventry Road/A45 corridor.

In 2008, I believe they had 57, 57A, (58?), 60 and 900. 20 minute frequency for 57 and 57A, 30 mins for the 58 and 10 mins for the 60 and 30 mins for the 900.

Which gives a combined bus frequency of every 3.75 minutes. Nowadays, we only have X1, X2 and 60 left, which gives the combined bus frequency of every 5 minutes.

Does anyone have similar examples for other bus corridors?