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:
| Location | Frequency | Call sign | Network | Call sign meaning |
| --- | --- | --- | --- | --- |
| Beach | 91.9 | K220FI (KDPR) | News and Classical |  |
| Bismarck | 90.5 | KCND | News and Classical | Capital of North Dakota |
| Bowman | 91.9 | K220FJ (KDPR) | News and Classical |  |
| Crosby | 91.9 | K220FF (KPPW) | News and Classical |  |
| Devils Lake | 91.7 | KPPD | News and Classical | Prairie Public Radio Devils Lake |
| Dickinson | 89.9 | KDPR | News and Classical | Dickinson Public Radio |
| Fargo | 91.9 | KDSU | Mixed News and Classical & Roots, Rock, and Jazz | North Dakota State University |
| Grand Forks | 89.3 | KUND-FM | News and Classical | University of North Dakota |
| Grand Forks | 90.7 | KFJM | Roots, Rock, and Jazz | Folk and Jazz Music |
| Jamestown | 91.5 | KPRJ | News and Classical | Public Radio Jamestown |
| Hettinger | 91.9 | K220FG (KDPR) | News and Classical |  |
| Lisbon | 98.3 | K252EZ (KDSU) | Mixed News and Classical & Roots, Rock, and Jazz |  |
| Minot | 88.9 | KMPR | News and Classical | Minot Public Radio |
| Plentywood, MT | 91.9 | K220FE (KPPW) | News and Classical |  |
| Thief River Falls, MN | 88.3 | K202BK (KUND-FM) | News and Classical |  |
| Tioga | 91.9 | K220FH (KPPW) | News and Classical |  |
| Wahpeton | 94.7 | K234BX (KDSU) | Mixed News and Classical & Roots, Rock, and Jazz |  |
| Williston | 89.5 | KPPR | Roots, Rock, and Jazz | Prairie Public Radio |
| Williston | 88.7 | KPPW | News and Classical | Prairie Public Williston |
Question:
which frequency has the most stations?
Answer:
91.9