( This ( ( may ( be ( associated ( ( ( ( with tantrums ) or ) up ) ( to ( ( several times ) ( an hour ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (MD may) (VP (VB be) (VP (VBN associated) (PP (PP (IN with) (NP (NNS tantrums))) (CC or) (RB up) (PP (TO to) (NP (NP (QP (JJ several) (NNS times))) (NP (DT an) (NN hour)))))))) (. .)))
This may be associated with tantrums or up to several times an hour.
(ROOT (S (NP (NNS Bacteria)) (VP (MD may) (VP (VB divide) (NP (NP (QP (JJ several) (NNS times))) (NP (DT an) (NN hour))))) (. .)))