The use frequency of the character yin appears very low in common speech and only appears as morpheme in the words.

“引”在现代汉语普通话里使用频率很低，而且只作为语素出现在词语里。

youdao

In her speech, Miss Jordan also urged Americans to work for the common good: "Many fear the future.

VOA: special.2010.05.09

By "difficult," it is meant, I think, well, first of all that it is in some sense set apart from common speech, as a specialized and highly self-conscious use of language.

艰深“的意思，我认为，首先，某种程度上它是和平时谈话有所不同的，专业性极强，对语言运用自知也很高。

耶鲁公开课 - 现代诗歌课程节选

In common speech, the word "theory" is often used to refer to ideas that have not been proven, but to scientists and philosophers it has a completely different meaning.

FORBES: Sciences and Medicine

In his speech, Mr Denham said disadvantaged white boys had more in common with their poor black classmates than with middle-class white people.

BBC: Minister says councils 'blind' to needs of white people

In a ground-breaking speech in parliament earlier this month, Mr Erdogan provoked tears when he spoke of the common pain of Turkish and Kurdish mothers who had lost sons in the conflict.

ECONOMIST: Turkey and the Kurds