HelenOS sources

nano              495 uspace/lib/cpp/include/__bits/chrono.hpp     using nanoseconds  = duration<int64_t, nano>;
nano              744 uspace/lib/cpp/include/__bits/chrono.hpp             constexpr chrono::duration<long double, nano> operator ""ns(long double nsecs)
nano              746 uspace/lib/cpp/include/__bits/chrono.hpp                 return chrono::duration<long double, nano>{nsecs};