Multiple instances of the action of dialing; the repeated act of calling phone numbers.
From dial + -ing (present participle) + -s (plural). The base verb 'dial' comes from the rotary telephone mechanism. The plural form indicates multiple dialing actions or events.
Today 'dialings' sounds old-fashioned, but in the 1990s phone-calling culture, counting your 'dialings' mattered—each one cost money if you were calling long distance, which is why people planned their calls carefully.
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