ex) What controls the number of times cells divide?
1) What controls the number of times (when) cells divide?
2) What controls the number of times (where) cells divide?
3) What controls the number of times (that) cells divide?
I wonder what is omitted between 'the number of times' and 'cells divide'
that Number does not refer to a time (when) or a place (where) .
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that
Number does not refer to a time (when) or a place (where) .