What is the meaning of と in this case

Question

This is one of the meanings according to https://nihongonosensei.net/?p=18330

繰り返し・累加 一人、また一人と辞めていった

I found 一人また一人と as an expression on https://nihongonosensei.net/?p=18330

I also found this example:

１度だけじゃなく、２度、３度と失敗した

In this case, how does it function grammatically?

Is it equivalent to Particle と after numbers?

Answer 1

Grammatically it should be the following (#5):

（副詞に付いて新たな副詞をつくり）ある状態を説明する意を表す。「そろそろ―歩く」「そよそよ―風が吹く」

That is, it is making (2度)3度 an adverb.

In both examples, the と is optional. Below are fine as well. (In this sene, the と is redundant.)

繰り返し・累加 一人、また一人辞めていった

１度だけじゃなく、２度、３度失敗した

So it is different from the one in the linked question (concrete number+と).