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:
| Ship | Guns | Class | Captain | Rank | Year |
| --- | --- | --- | --- | --- | --- |
| HMS Hyperion | 74.0 | Third-rate ship of the line | Richard Bolitho | Midshipman | 1794 |
| HMS Impulsive | 64.0 | Third-rate ship of the line | Thomas Herrick | Midshipman | 1795–1797 |
| HMS Lysander | 74.0 | Third-rate ship of the line | Richard Bolitho (commodore) | Lieutenant | 1798–1800 |
| HMS Phalarope | 32.0 | Frigate | Daniel Emes | Lieutenant | 1801 |
| HMS Firefly | 14.0 | Brig | Adam Bolitho | Commander/captain | 1803–1805 |
| HMS Anemone | 38.0 | Frigate | Adam Bolitho | Captain | 1806–1812 |
| HMS Valkyrie | 42.0 | Frigate | Adam Bolitho | Flag captain | 1813–1814 |
| HMS Unrivalled | 46.0 | Frigate | Adam Bolitho | Captain | 1815 |
| HMS Athena | 74.0 | Third-rate ship of the line | Adam Bolitho | Flag captain | 1817 |
| HMS Onward | 38.0 | Frigate | Adam Bolitho | Captain | 1818–1819 |
Question:
What were the fewest amount of guns possessed by a frigate that served in 1815?
Answer:
46.0