frequently, tie
婁 centers on the idea of repeated connection: something done frequently or tied together. The meanings 'frequently' and 'tie' both involve a sense of recurring or linked action.
婁 is an older form that combines 女 (woman) with a phonetic element above, possibly related to tying or repeated action. The exact historical development is uncertain, but it likely served as a phonetic component in other characters.
The top part looks like a tied bundle over 女 (woman). Imagine a woman frequently tying bundles, representing repeated action and connection.
For ル, picture a loop being tied repeatedly: loop -> ル, and the loop represents the frequent tying action of 婁.