DNS Benchmark shows lost queries

How do I tell if there are dropped queries in the logs? Doing the command

dig +short chaos txt evictions.bind

gives the result "0"
Does that mean that there are no lost queries?

About DNS benchmark, I found that others have been using it successfully with pi-hole

But I was also thinking that maybe some of the domain names that DNS Benchmark uses for testing are blocked by pi-hole and that DNS Benchmark mistakenly classifies those that are blocked as "lost queries". I haven't been able to find any detailed information about what DNS Benchmark classifies as "lost queries". I have asked this question at GRC's | DNS Benchmark & Spoofability Test Feedback  

By the way, thanks for this great piece of software!