N2 — outside your level filter
にわたって
spanning N; across the whole extent of N — a period, distance, or scope covered in full
台風の影響で、三日間にわたって電車が止まったままだったんだよね。
taifuu no eikyou de, mikkakan ni watatte densha ga tomatta mama datta n da yo ne.
Because of the typhoon, the trains stayed stopped for a full three days straight. casual
この調査は全国の主要都市にわたって行われた。
kono chousa wa zenkoku no shuyou toshi ni watatte okonawareta.
This survey was conducted across major cities nationwide. neutral