GIVE ANSWERS - English

Always a pleasure

Thank you so much , your explanations are always great and easy to understana 💐

Not always.

In both British and American English, ”a buildup” without an adjective is used to describe a media campaign/hype leading up to an event, a quite frequently used word in many contexts.

In British English, ”a buildup” commonly also describes the formation of a traffic jam.

As for the prepositions.. ”in” verses ”at” can both be used in British English for describing the position of the buildup, each having a different emphasis. ”in” would be preferentially used in American English. Similarly, both ”on” and ”over” are used in British English - each preposition describing a different aspect - while ”on” tends to be more exclusively used in American English.

British and American English require different explanations. For example the sentence ”There is a scum buildup on my bathtub”.

In British English, you would most likely say ”there is scum buildup over my bathtub” - giving the emphasis that the buildup is over the base and raised inner surfaces of the bathtub, or ”there is scum buildup on my bathtub” = ”the location of scum buildup is the bottom of the bathtub”. There’s a lot of difference in prepositional usage between British and American English, so I’d left it at that with the prepositional explanations. All this is aside from the usage of ”buildup” as an uncountable noun in this instance in British English verses as a countable one in American...

That’s why I left my answer at the point which I did. The poster is at around B2 level and so is after mainly the gist of the meaning. If I were to have given a more in-depth answer, then the focus would have been on British English given the syntax of the phrase in question.

Also I would have given an answer analogous to all of the above for someone at a high C1 or somewhere into C2.