Correct

前后脚儿

/ qiánhòu jiǎor / 
Strokes

Example

As an Adverb

almost simultaneously; one close behind another

1
Wǒ
我
liǎ
俩
qiánhòu
前后
jiǎor  
脚儿
dàojiā
到家
  
。

We got back home almost at the same time.