Schizophrenia is not a "split mind" as is popularly believed.

精神分裂症并不是普遍认为的“分裂了的精神”。

《柯林斯英汉双解大词典》

The thought really crossed my mind for a split second - 'there is no way' [I am going to catch up].

他说：“当时有一瞬间我确实想，不可能追上了。”

youdao

There are not two minds, there is ome mind trying to split itself into two.

没有谁会同时具有两个思想，具有的只会是一个试图将自己一分为二的思想。

youdao

For centuries patients gripped by schizophrenia (Greek for "split mind, " although it isn't related to multiple personality disorder) were relegated to institutions.

FORBES: Silencing the Voices

It never crossed his mind "for a split second, " Mr. Hikind said Monday, that people might be hurt by the costume.

WSJ: Hikind Apologizes for Blackface Costume