Correct

放怀

/ fàng huái / 
Strokes

Example

As a Verb

do sth to one's heart's content

1
Fàng
放
huái
怀
gāogē
高歌

sing to one's heart's content

2
Fànghuáidàxiào
放怀大笑

let out loud laughter; laugh heartily

As a Verb

feel relieved; rest assured

3
Tīng
听
le
了
nā
那
xiāoxi
消息
  
,
tā
他
fàng
放
huái
怀
le
了
xǔduō
许多
  
。

He felt much relieved at the news.