Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Interregnum began | Interregnum ended | Duration | Count Palatine of Saxony | Count Palatine of the Rhine |
| --- | --- | --- | --- | --- |
| 9 December 1437 death of Sigismund | 18 March 1438 election of Albert II | 3 months, 9 days | Frederick II, Elector of Saxony | Louis IV, Elector Palatine |
| 27 October 1439 death of Albert II | 2 February 1440 election of Frederick III | 3 months, 6 days | Frederick II, Elector of Saxony | Louis IV, Elector Palatine |
| 12 January 1519 death of Maximilian I | 17 June 1519 election of Charles V | 5 months, 5 days | Frederick III, Elector of Saxony | Louis V, Elector Palatine |
| 20 January 1612 death of Rudolph II | 13 June 1612 election of Matthias | 4 months, 24 days | John George I, Elector of Saxony | Frederick V, Elector Palatine |
| 20 March 1619 death of Matthias | 28 August 1619 election of Ferdinand II | 5 months, 8 days | John George I, Elector of Saxony | Frederick V, Elector Palatine |
| 2 April 1657 death of Ferdinand III | 18 July 1658 election of Leopold I | 15 months, 16 days | John George II, Elector of Saxony | Ferdinand Maria, Elector of Bavaria |
| 17 April 1711 death of Joseph I | 12 October 1711 election of Charles VI | 5 months, 25 days | Frederick Augustus I, Elector of Saxony | John William, Elector Palatine |
| 20 October 1740 death of Charles VI | 14 January 1742 election of Charles VII | 14 months, 25 days | Frederick Augustus II, Elector of Saxony | Charles Albert, Elector of Bavaria |
| 20 January 1745 death of Charles VII | 13 September 1745 election of Francis I | 7 months, 24 days | Frederick Augustus II, Elector of Saxony | Maximilian III, Elector of Bavaria |
| 20 February 1790 death of Joseph II | 30 September 1790 election of Leopold II | 7 months, 10 days | Frederick Augustus III, Elector of Saxony | Charles Theodore, Elector of Bavaria |
Question:
What is the number of interregnum for duration 3 months, 6 days?
Answer:
1.0