Correct

节律

/ jiélǜ / 
Strokes

Definition

rhythm/pace

Example

As a Noun

rhythm and pace (of moving things)

1
Shēngwù
生物
jiélǜ
节律

biological rhythm

2
Màibó
脉搏
  
/
xīndòng
心动
jiélǜ
节律

rhythm of one's pulse/heart

As a Noun

rhyme and rhythm (of a poem, etc); prosody