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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/occurrencecount_progressiveindexof.html).*
# Square Original Of or Equal To (`⊒`)
## `⊒ 𝕩`: Occurrence Count
Number of times each major cell of `𝕩` appears before itself.
⊒ 2‿7‿1‿8‿1‿7‿1‿8‿2‿8‿4
≍⟜⊒ 2‿7‿1‿8‿1‿7‿1‿8‿2‿8‿4
## `𝕨 ⊒ 𝕩`: Progressive Index Of
Index of the first unused match of each major cell of `𝕩` in `𝕨`. If there are no more matches left, length of `𝕨` is placed in that position.
"aaa" ⊒ "aaaaa"
"aaabb" ⊒ "ababababab"
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