"spacing" in the noun sense
1. spacing
the time between occurrences of a repeating event
"some women do not control the spacing of their children"
2. spacing, spatial arrangement
the property possessed by an array of things that have space between them
"spacing" in the verb sense
1. space
place at intervals
"Space the interviews so that you have some time between the different candidates"
Source: WordNet® (An amazing lexical database of English)
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