As A1brandz mentions, there isn’t a solid rule and you do want to focus on quality but there is another factor. Mainly you want to avoid spike in link building data. Remember that links (when built naturally) have a pattern over time. If when the pattern begins, it is fast, then always building links fast may not be an issue. Conversely, if links were built slowly over time (say about 1 a day) and then all of a sudden there are 100 links every day, this throws up a red flag.
In a nutshell, just don’t make it look like you are building tons of links in a spammy way and you should be fine.
Lots of resources here on the topic,