Correct

三天两头

/ sān tiān liǎng tóu / 
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/三天两头-Chinese-idioms-Cchatty-544ad148-09aa-45c8-b428-b4c99cf0925c-1612776155.jpg

Collocation

1
三天两头……
2
三天两头地……

Definition

三天两头

Literally means:

every two or three days

Actually means:

It means every other day. It figuratively means things happen frequently.

隔一天或两天,形容事情经常或时常发生。

Example

Used as adverbial adiunet djunct. (作状语)
1
Tā
她
zǒngshì
总是
sāntiānliǎngtóu
三天两头
dì
地
lái
来
wèn
问
wǒ
我
jiè
借
qián
钱
  
,
jiè
借
le
了
yòu
又
bù
不
hái
还
  
,
wǒ
我
xiànzài
现在
kàndào
看到
tā
她
jiù
就
xiǎng
想
duǒkāi
躲开
  
。

She always asked me twice in three days to borrow money, borrowed it and didn't pay it back, and now I want to avoid it when I see her.

2
Nǐmen
你们
zěnme
怎么
sāntiānliǎngtóu
三天两头
chǎojià
吵架
ā
啊
  
?
Yǒu
有
shénme
什么
shìqing
事情
hǎohǎo
好好
shāngliang
商量
ma
嘛
  
,
bùyào
不要
zǒngshì
总是
chǎojià
吵架
  
。

Why are you fighting for three days? There's nothing to discuss, don't always quarrel.

3
Nǐ
你
sāntiānliǎngtóu
三天两头
táokè
逃课
  
,
zěnme
怎么
néng
能
xué
学
de
得
hǎo
好
ne
呢
  
!

How can you learn well when you skip classes at two ends in three days?