Question: How long was the rule of Albert V of Austria
About the article "Austria", section "Middle Ages".

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Albert the Magnanimous KG (10 August 1397 – 27 October 1439) was King of Hungary and Croatia from 1437 until his death.
He was also King of Bohemia, elected (but never crowned) King of Germany as Albert II, duke of Luxembourg and, as Albert V, archduke of Austria from 1404. 
  Albert III ("Albrecht III"), duke of Austria until 1395, from 1386 (after the death of Leopold) until 1395 also ruled over the latter's possessions.
Albert IV ("Albrecht IV"), duke of Austria 1395–1404, in conflict with Leopold IV.
Albert V ("Albrecht V"), duke of Austria 1404–1439, Holy Roman Emperor from 1438–1439 as Albert II.
See also below.
Ladislaus Posthumus, son of the above, duke of Austria 1440–1457.  
Albert IV of Austria (19 September 1377 – 14 September 1404) was a Duke of Austria.
He was born in Vienna, the son of Albert III of Austria and Beatrix of Nuremberg.
He was the Duke of Austria from 1395 until 1404, which then included roughly today's Lower Austria and most of Upper Austria, as the other Habsburg dominions were at that time ruled by his relatives of the Leopoldinian Line of the family.
Albert's rule was characterized by quarrels with that part of his family and with members of the Luxemburg dynasty, Wenceslaus and Sigismund.
Albert died at Klosterneuburg, Lower Austria, in 1404.
He is buried in the Ducal Crypt in the Stephansdom in Vienna.
He was succeeded by his son Albert.
Through his maternal grandmother, Elisabeth of Meissen, Albert IV descended from Babenberg dukes of Austria. 
In 1379 Albert III retained Austria proper, ruling till 1395.
He was succeeded by his son Albert IV (1395–1404) and grandson Albert V (1404–1439) who regained the imperial throne for the Habsburgs and through his territorial acquisitions was set to become one of the most powerful rulers in Europe (Beller p. 34) had he not died when he did, leaving only a posthumous heir, born four months later (Ladislaus the Posthumous 1440–1457).
Instead it was Ladislaus' guardian and successor, the Leopoldian Frederick V the Peaceful (1457–1493) who benefited.
The Albertinian line having become extinct, the title now passed back to the Leopoldians.
Frederick was so aware of the potential of being the young Ladislaus' guardian that he refused to let him rule independently upon reaching majority (twelve in Austria at the time) and had to be forced to release him by the Austrian Estates (League of Mailberg 1452). 
In the 14th and 15th centuries, the Habsburgs began to accumulate other provinces in the vicinity of the Duchy of Austria.
In 1438 Duke Albert V of Austria was chosen as the successor to his father-in-law, Emperor Sigismund.
Although Albert himself only reigned for a year, henceforth every emperor of the Holy Roman Empire was a Habsburg, with only one exception.
The Habsburgs began also to accumulate lands far from the hereditary lands.
In 1477 Archduke Maximilian, only son of Emperor Frederick III, married the heiress Maria of Burgundy, thus acquiring most of the Netherlands for the family.
His son Philip the Fair married Joanna the Mad, the heiress of Castile and Aragon, and thus acquired Spain and its Italian, African and New World appendages for the Habsburgs.
In 1526 following the Battle of Mohács, Bohemia and the part of Hungary not occupied by the Ottomans came under Austrian rule.
Ottoman expansion into Hungary led to frequent conflicts between the two empires, particularly evident in the so-called Long War of 1593 to 1606.
The Turks made incursions into Styria nearly twenty times; burning, pillaging, and taking thousands ofslaves.