There are following limitations on the number of keywords you can visualize.
- Summarized keywords will be kept for up to 12 months including the current month (in JST).
- Up to top 5,000 keywords per log file are summarized.
- Up to 100,000 sub keyword queries are summarized.
- Up to most recent 100,000 “0 hits” queries are summarized.
Rare keywords in one log file will be dropped out of the summary buffer. The dropped out keywords, therefore, will not be counted in even the keywords can be seen often in the next log file. That means that displayed number of keywords is approximate.