2) The GitHub code defaults to 'quarterly' (which is also shown in the error message returned in 1)) - eventhough this does not seem supported anymore (?). Looking at the closed issues list (https://github.com/yql/yql-tables/issues?state=closed) I can see that there has been some recent activities related to the tables above - but it still defaults to quarterly (?).
3) I have tried to find the right syntax for controlling the time frame in the query (in an effort to override the default value 'quarterly') ... but no luck (e.g. in the YQL Exerciser I tried to write '... symbol = 'T' AND timeFrame = 'annual'). I wonder how the syntax would look for 'quarterly' ... when that is supposed to be 'blank', when requesting the data (according to the link in my first post). Guess this points back to 2) that requires the default value to be 'blank' instead of 'quarterly' in the code - because you can't request that the deault value (set in the code) to be overwritten with 'blank' when calling it (or at least I haven't found a way to overwrite it).