Timing is the actual time taken for the spoken words
It can be better understood by the example of a radio speech. Radio talks are usually short and sweet. The talk is prepared which is based on counting words per minute. Say 100 to 200 words per minute. So, timings for a speech is constructing the information of a speech correctly.
A good orator or a professional speaker needs good timing. Few speakers talk according to their schedule. The better way to acquire it is through diligence say rehearsal.
Timing is discipline
A speaker should know where to speed up and speed down. A news reader in a radio station or television centre is time conscious. They will be knowing how to balance each sentence to its overall value to the item. School teachers and college lecturers should all posses effective precise timing.