How would you say "She has been waiting for ten or eleven hours"?
Čeká už deset nebo jedenáct hodin. (bookish variant "Čeká už po ...")
Is the už necessary or could you have said "Čeká deset nebo jedenáct hodin."?
How would you say "She waits from ten or eleven o'clock"?
What is the exact meaning? Why the present simple tense? Is this repeated?