In بِكَثْرَةِ السُّجُودِ, كَثْرَة means “abundance or frequency,” and السُّجُودِ means “prostration.” The expression encourages consistent worship and more prostration through prayer, including voluntary prayers. It does not by itself establish an arbitrary new ritual of detached prostrations.
A practical approach is to maintain obligatory prayers and then develop a manageable routine of additional prayer, considering health and lawful times. The aim is not merely to compete over numbers: proper performance and attentive devotion remain essential.