Does reciting "There is no god but Allah, alone, without partner; to Him belongs all sovereignty and praise, and He is over all things competent" once in the morning and once in the evening suffice over reciting it 100 times or 10 times, due to laziness and the long time it takes to recite?

It has been previously explained that the remembrance: "There is no god but Allah, alone, without partner. To Him belongs all sovereignty and all praise, and He is over all things competent," is sound and virtuous. The reward mentioned for it can be obtained by saying it once, or ten times, or a hundred times. The detailed reward for each number implies that saying it once does not suffice for saying it ten or a hundred times. However, reward is hoped for whoever says it once, which is equivalent to freeing a slave. A Muslim should not be lazy regarding this remembrance.