Sometimes

• POS: Adverb
• HYPHEN: some=times

CIDE DICTIONARY

Sometimes, adv. [Sometime + adverbial ending -s, as in -wards.].

•  Formerly; sometime.  [1913 Webster]

  "That fair and warlike form
  In which the majesty of buried Denmark
  Did sometimes march."  [1913 Webster]
•  At times; at intervals; not always; now and then; occasionally.  [1913 Webster]

  "It is good that we sometimes be contradicted."  [1913 Webster]

Sometimes . . . sometimes, at certain times . . . at certain other times; as, sometimes he is earnest, sometimes he is frivolous.

Sometimes, a. 

 Former; sometime.  [1913 Webster]
"Thy sometimes brother's wife."  [1913 Webster]

OXFORD DICTIONARY

Sometimes, adv. at some times; occasionally.

ROGET THESAURUS

Sometimes

Frequency

N frequency, oftness, oftenness, commonness, repetition, normality, example (conformity), routine, custom (habit), regularity, uniformity, constancy, clock-work precision, punctuality, even tenor, system, routine, formula, rule, keynote, standard, model, precedent, conformity, frequent, many times, not rare, thickcoming, incessant, perpetual, continual, steady, constant, thick, uniform, repeated, customary, (habit), regular (normal), according to rule, common, everyday, usual, ordinary, familiar, old-hat, boring, well-known, trivial, often, oft, ofttimes, oftentimes, frequently, repeatedly, unseldom, not unfrequently, in quick succession, in rapid succession, many a time and oft, daily, hourly, every day, every hour, every moment, perpetually, continually, constantly, incessantly, without ceasing, at all times, daily and hourly, night and day, day and night, day after day, morning noon and night, ever anon, invariably (habit), most often, commonly, sometimes, occasionally, at times, now and then, from time to time, there being times when, toties quoties, often enough, when the mood strikes, again and again.