It seems to be the accepted term in the scholarly and clinical community.
“Collective trauma” or “collective PTSD”? The latter is what we were discussing earlier in this thread. It has zero occurrences on Google Ngrams: https://books.google.com/ngrams/graph?content=Collective+PTSD%2C+collective+trauma&year_start=1800&year_end=2019&corpus=en-2019&smoothing=3
Trauma and ptsd can be used interchangeably. PTSD is more precise term and clinically significant. Trauma is more colloquial. I used PTSD on purpose to accent the debilitating effect it has on the society as a whole.
trauma and ptsd cannot be used interchangeably at all. PTSD is a specific mental condition documented in the DSM-5 and recognized by doctors that have multiple variations and nuances that must be taken into account. Trauma is an overarching term to describe experiences that have had a significant and profound impact on someone’s mental state and health. I’m not usually a crazy stickler for word usage but this is just horribly imprecise language. You can have trauma without having PTSD. They are not the same thing and should not be treated as such.
I was talking about collective trauma which OP was citing, though their initial term is collective PTSD.
Why would you use n-gram and not journal search engine like Google Scholar. There seems to be an engagement in the concept of collective PTSD since about 2007.
Is this an area of research or practice for you? It is not mine.