báo​báobó​bó

very thin

薄薄 báo​báo frequency
very thin adjective
extremely thin (of physical objects)
薄薄 bó​bó
vast
(literary) very broad or vast, especially in reference to land
[sound]
(literary) the sound of a carriage being driven rapidly
diluted
(literary) light or weak in taste (as of wine or tea)

Frequency

Written text
3.31 per million

Sources

Frequency data
BCC Corpus (BLCU)