Correct

后脚

/ hòujiǎo /
Strokes

Definition

(one moment ...,) the next .../trailing foot (in walking)

Example

As a Noun

rear foot (in walking)

1
Qiánjiǎo
前脚
huá
  
,
hòujiǎo
后脚
zhàn
wěn
  

As the front foot slipped, the rear foot became unsteady.

As a Preposition

[usu used together with前脚]immediately after

2
qiánjiǎo
前脚
dào
chēzhàn
车站
  
,
hòujiǎo
后脚
jiù
gǎndào
赶到
le
  

No sooner had I got to the station than he arrived.