a thousand times / thousandfold
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a thousand times
Used as a strong exaggeration to express that something happens very often or occurs in very large numbers.
Ich habe dich schon tausendfach gebeten, die Schuhe wegzuräumen.
I've asked you a thousand times already to put your shoes away.
thousandfold
Indicates that something happens exactly one thousand times or exists in a thousandfold version.
Die Datei wurde tausendfach kopiert und im Netzwerk verteilt.
The file was copied a thousand times and distributed across the network.
The word is made up of 'tausend' (thousand) and the ending '-fach'. The ending '-fach' means '-times' or '-fold' and is attached to numbers to express multiplication.
Der Gewinn war tausendfach höher als der Einsatz.
The profit was a thousand times higher than the stake.
The literal meaning ('exactly 1000 times') is often found in technical or factual contexts. The figurative meaning ('very often') is usually used as an exaggeration in emotional everyday language.
Das Mikroskop ermöglicht eine tausendfache Vergrößerung.
The microscope enables thousandfold magnification.
'Tausendfach' (a thousand times / thousandfold) can be used as an adverb and then remains unchanged. But it can also stand as an adjective before a noun and is then declined.
Dieses Lied wurde bereits tausendfach im Radio gespielt.
This song has already been played a thousand times on the radio.
In its exaggerated meaning, 'tausendfach' (a thousand times) is often combined with verbs of saying or experiencing, for example 'tausendfach gesagt' (said a thousand times), 'tausendfach gehört' (heard a thousand times), or 'tausendfach erlebt' (experienced a thousand times).
Diese Geschichte habe ich schon tausendfach gehört.
I've heard this story a thousand times already.
often / multiple
Vielfach means here that something occurs often or in many cases. Tausendfach is a much stronger, figurative exaggeration for a very high number. Vielfach fits a factual statement; when the exceptional frequency is to be emphasized, tausendfach is appropriate.
Diese Warnung wurde tausendfach bestätigt.
This warning was confirmed a thousand times.
Diese Warnung wurde vielfach bestätigt.
This warning was confirmed many times.
