bù​dào

not arrive

不到 bù​dào
not arrive adverb
failing to reach a destination or arrive at a physical location

It's almost two o'clock; why hasn't the shuttle bus arrived yet?

insufficient adverb
failing to reach a required standard, level, or degree of quality

With his limited energy, it's inevitable that some things will be overlooked.

less than adverb
below a specific numerical value, amount, age, or duration

He is not even thirty years old yet.

Frequency

Movie subtitles
43.5 per million appears in 19% of films
Written text
176.5 per million

Sources

Definitions
CC-CEDICT