MILLI
From Icelandic Parsed Historical Corpus (IcePaHC)
Second PP idomsonly P if milli takes no complement:
(IP-SUB (NP-SBJ *con*)
(VBDI fór-fara)
(PP (ADVP-1 (ADV þar-þar))
(P á-á)
(PP (P milli-milli) (ADVP *ICH*-1)))))))))
If there were only one P involved, then the PP would be parsed as postpositional, parallel to "darüber" in German or "there about" in the English corpora as below:
(PP (ADV there) (P aboute))
