Correct

三五成群

/ sān wǔ chéngqún / 
Strokes

Definition

in groups of three or four (idiom)

Example

Definition

in threes and fours; in knots

1
Rénmen
人们
sānwǔchéngqún
三五成群
dì
地
liáotiān
聊天
  
。

People stood around in small huddles, chatting merrily.