/usr/share/link-grammar/en/words/units.4.dot is in link-grammar-dictionaries-en 4.7.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1
min.u h.u hr.u dy.u wk.u wks.u mo.u mos.u yr.u yrs.u