qián​jǐ​tiān

past few days

前几天 (前幾天) qián​jǐ​tiān
past few days directional
a few days ago or during the several days immediately preceding the present

I've been sick for the past few days and didn't go to work.

days prior directional
a few days before a specific event or point in time; the previous few days

In the days leading up to the competition, the athletes were intensifying their training.

Frequency

Written text
12.5 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)