Correct

工夫 vs 时间

/ gōngfū vs shíjiān /
Strokes

Formula

1
时间观念 (time concept)
2
节约时间 (save time)
3
营业时间 (business time)
4
工夫不大 (in very short time)
5
不大工夫 (in very short time)

Definition

工夫 and 时间 both are Noun, which means [time].

Example

时间 is more formal; 工夫 is only used in spoken language to mean "a period of time". Sometimes the two are interchangeable.
1
Zhīyòng
只用
le
shí
tiān
de
gōng
工夫
  
(
shíjiān
时间
  
)
  
,
zhè
piān
lùnwén
论文
jiù
xiě
chéng
le
  

It only took me ten days to finish the thesis.

2
yǒu
gōng
工夫
  
(
shíjiān
时间
  
)
cānjiā
参加
zhège
这个
wǎnhuì
晚会
ma
  
?

Do you have time to go to the party?

时间 can be used in formal speech, while 工夫 cannot.
时间 can make up phrases such as 时间观念 (time concept), 节约时间 (save time), 营业时间 (business time), etc. 工夫 is not so used.
时间观念 (time concept) 节约时间 (save time) 营业时间 (business time)
3
Shíjiān
时间
jiù
shì
shēngmìng
生命
  

Time is life.

4
Zhèzhǒng
这种
ruǎnjiàn
软件
可以
wéi
nín
jiéshěng
节省
bǎoguì
宝贵
de
shíjiān
时间
  

The software can save you some time.

工夫 can be used in phrases of 工夫不大 or 不大工夫 (in very short time), but 时间 cannot be so used.
工夫不大 (in very short time) 不大工夫 (in very short time)
5
不大
gōng
工夫
  
,
jiù
bàn
wán
le
shǒu
手续
  

He finished his formalities in a while.

6
Gōng
工夫
不大
jiù
bài
xià
zhèn
lái
  

He was defeated after a while.

工夫 can be written as 功夫 which also means "skill, ability, and even martial arts ,etc".
7
zhī
huā
le
zuìshǎo
最少
de
gōng
工夫
  
(
gōngfu
功夫
  
)
  
,
què
réngrán
仍然
tōngguò
通过
le
kǎoshì
考试
  

He did the bare minimum of work but still passed the exam.

8
Zhěng
整理
zhèxiē
这些
wénjiàn
文件
shì
hěn
fèigōngfu
费工夫
  
(
gōngfu
功夫
  
)
de
shì
  

Sorting these papers out is going to be a long job.