We can always say the Name of Amida Buddha

Question: If it is said that it does not matter how many times we recite Nembutsu why does Shinran urge us to say it constantly in this hymn:

 

“Those who deeply entrust themselvesTo Amida’s Vow of great compassionShould all say Namo Amida Butsu constantly,Whether they are waking or sleeping.”

 

My answer:Shinran also said:

 

"In the Primal Vow are the words:'Saying my Name perhaps even ten times'.Know from the words 'ten times' that appear from the beginning in the Vow itself that saying the Name is not limited to one utterance. And the word 'perhaps even' makes it clearer still that t