n this case your second answer will be marge in one answer.. cause you sent your message so fast so you have to wait at least 1 min.. so you can sand 60 message in 60 min. and in full day 24*60 = 1440 message..
But be careful your all message view by mode , admins and if you sent no sense message or repeat message your all message will be deleted and your account will ban
so now you know that you can sand 1440 message max in 1 day but all message follow rules.. like help to others , site related post ,
You account will be ban if you do it
So never do it : - Do not repeat one message again and again and even you can't sand like this type message Hello , good morning , afternoon , good night , bye , good hack , thank you , thanks , Hi Sir , Well done ( chat related ) if you do it your account will be ban