
viermal
four times
Indicates the number four; four times.
Ich habe viermal geklingelt, aber niemand hat die Tür geöffnet.
I rang the bell four times, but no one opened the door.
four times
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four times
Indicates the number four; four times.
Ich habe viermal geklingelt, aber niemand hat die Tür geöffnet.
I rang the bell four times, but no one opened the door.
The word is made up of the number 'vier' (four) and the ending '-mal' (times). This structure is used for all counting adverbs to indicate repetition, e.g. 'einmal' (once), 'zweimal' (twice), 'dreimal' (three times).
Ich habe dir das jetzt schon zehnmal erklärt.
I've already explained that to you ten times now.
As an adverb, 'viermal' (four times) can stand in different places in the sentence. If it is in position 1, the verb follows directly after it. But it can also stand in the middle of the sentence.
Viermal habe ich versucht, dich anzurufen.
Four times I tried to call you.
'Viermal' (four times) is often used to indicate the frequency of an action within a period of time. Typical combinations are 'viermal pro Woche' (four times per week), 'viermal im Jahr' (four times a year), or 'viermal hintereinander' (four times in a row).
Der Kurs findet viermal pro Woche statt.
The course takes place four times per week.
fourfold
Viermal and vierfach both refer to the number four. Viermal generally indicates how often something happens, whereas vierfach describes a fourfold quantity, number, or composition. So ask whether you are counting repetitions or indicating a size or composition.

Die Mitarbeiter prüften die Rechnung viermal, bevor sie sie abschickten.
The employees checked the invoice four times before sending it.
Für die vier Abteilungen wurde die Rechnung in vierfacher Ausfertigung ausgedruckt.
For the four departments, the invoice was printed in quadruplicate.