Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Upon the whole the Sabines maintained their footing in the mountains, as in the district bordering on Latium which has since been called by their name, and so too in the Volscian land, presumably because the Latin population did not extend thither or was there less dense; while on the other hand the well-peopled plains were better able to offer resistance to the invaders, although they were not in all cases able or desirous to prevent isolated bands from gaining a footing, such as the Tities and afterwards the Claudii in Rome.(2) In this way the stocks here became variously mingled, a state of things which serves to explain the numerous relations that subsisted between the Volscians and Latins, and how it happened that their district, as well as Sabina, afterwards became so early and speedily Latinized.
2. I. IV. Tities, Luceres
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Reference address : https://www.ellopos.net/elpenor/rome/1-08-umbro-sabellian-samnites.asp?pg=4