repeatedly; over and over again
Emphasizes doing something many times, often with a sense of earnestness or persistence. Used with verbs of requesting, apologizing, warning, etc.
He apologized over and over again.
I earnestly ask you again and again.
in many layers; layer upon layer; row upon row
Describes physical layering, stacking, or lining up of objects. Also used for folding something multiple times.
I slept with blankets piled up in many layers.
I folded the letter several times.