How often do embedded relative clauses occur in Japanese conversation?


I think the question is clear enough. [I read an article regarding how English
speakers comprehend embedded clauses in
Japanese](https://www.academypublication.com/issues2/tpls/vol07/10/03.pdf),
and how in general it takes more time to comprehend a sentence that requires
more mental work to follow; English speakers prefer sentences that with "non-
center embedded clauses" and are "short-before-long"; here are examples of
each:

> Jacob [in a fast pace] walked to the store. (Center-Embedded Clause)

> Jacob walked to the store [in a fast pace]. (Non-Center-Embedded Clause)

> Socrates [without emotion] stated a chicken that eats its own eggs does not
> count as cannibalism. (Short-Before-Long)

> Socrates stated a chick that eats its own eggs does not count as cannibalism
> [without emotion]. (Long-Before-Short)

This is preferred for head-initial languages like English (where the relative
clause goes after the subject), but for a head-final language like Japanese
(where the relative clause goes before the subject), the preferences are
flipped as shown in the examples provided in the research:

> [健が嫌っている]女が議員を褒めた。(Non-Center)

> 女が[健が嫌っている]議員を褒めた。(Center)

The research ultimately showed that native Japanese speaker's better
understand non-center and long-before-short (acknowledging as well how は vs. が
affects comprehension), which aligns with the first option above. However,
these were written examples of sentences, which allow more planning before
saying. Basic principles define what is easier to say and comprehend, as well
as what one could come up with quicker when actively speaking. I am myself
unaware of how often embedded clauses are used in English conversation, but
what of Japanese conversation? Given the structural differences in sentence
forming, would embedded clauses occur more or less often? I hope someone with
more experience with Japanese conversation can answer this.

