Understand the difference between someone who speaks to you on their free time, and someone who frees their time to speak to you. 這句話的意思?

認清楚「有些人在空閒時才跟你說話」與「有些人會騰出時間來跟你說話」的分別。

You gotta understand the difference between someone who speaks to you on their free time, and someone who frees their time to speak to you.
字面上的意思是:你必須知道「那些在他們空閒的時間才跟你談話的人」和「那些特地空出時間來跟你談話的人」的區別。
簡單來說就是要分清楚「那些只是閒的時候才來找你的人」，以及「那些真的願意和你做朋友的人」。
用來提醒、看清誰才是你真正的好朋友。

理解某人在他空閑時間和你說話及某人將時間空出來為了和你說話兩者的不同
on your free time要改成in your free time

Understand the difference between someone who speaks to you on their free time, and someone who frees their time to speak to you.

他們空閒時間裡,瞭解與您對談意義。

要區分某人是空閒時才與你說說話或者是只要你想和他說話任何時間都可以，這可以看出你倆交情如何

要明白人們在空閒時和你說話與人們空出時間和你說話的分別

某人有空時願跟你說話，和某人隨時願意和你說話，是否了解這二者的不同

Know the difference that there are two group of people. One is that they will talk to you only at their free time, and the other group of people will find a free time to talk to you even they are very busy.

了解別人誰說話你自己的空閒時間，和別人誰釋放自己的時間和你說話的區別。