Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Olga Fedori
Table title:
Filmography
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Role </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > The Adventure of Earthboy and Stargirl </td><td colspan=1 rowspan=1 > Stargirl </td><td colspan=1 rowspan=1 > Short film; credited as Olga Fedorishcheva </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2007 </td><td class="highlighted"  colspan=1 rowspan=1 > Skins </td><td class="highlighted"  colspan=1 rowspan=1 > Anka </td><td colspan=1 rowspan=1 > Episode: "Maxxie and Anwar" </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > The Goldfish </td><td colspan=1 rowspan=1 > Alexa </td><td colspan=1 rowspan=1 > Short film </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2007 </td><td class="highlighted"  colspan=1 rowspan=1 > EastEnders </td><td class="highlighted"  colspan=1 rowspan=1 > Anya Covalenco </td><td colspan=1 rowspan=1 > 4 episodes </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > Maxwell </td><td colspan=1 rowspan=1 > Irina </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > Bird Feeder </td><td colspan=1 rowspan=1 > Scarlet </td><td colspan=1 rowspan=1 > Short film </td></tr>
<tr> <td colspan=1 rowspan=1 > 2008 </td><td colspan=1 rowspan=1 > Trial & Retribution </td><td colspan=1 rowspan=1 > Sofia </td><td colspan=1 rowspan=1 > Episode: "The Rules of the Game: Part 1" </td></tr>
<tr> <td colspan=1 rowspan=1 > 2008 </td><td colspan=1 rowspan=1 > Mum & Dad </td><td colspan=1 rowspan=1 > Lena </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > Doctors </td><td colspan=1 rowspan=1 > Ania Mironov </td><td colspan=1 rowspan=1 > Episode: "Arranged Family" </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > Get to Know Me </td><td colspan=1 rowspan=1 > Sara </td><td colspan=1 rowspan=1 > Short film </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > Signal from Shore </td><td colspan=1 rowspan=1 > Katherina Volkova </td><td colspan=1 rowspan=1 > Short film </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > The Wolfman </td><td colspan=1 rowspan=1 > Young Gypsy Woman </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010–19 </td><td colspan=1 rowspan=1 > Holby City </td><td colspan=1 rowspan=1 > Frieda Petrenko </td><td colspan=1 rowspan=1 > Main role; 100 episodes </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016 </td><td colspan=1 rowspan=1 > The Surrogate </td><td colspan=1 rowspan=1 > The Surrogate </td><td colspan=1 rowspan=1 > Short film </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018 </td><td colspan=1 rowspan=1 > Quadraturin </td><td colspan=1 rowspan=1 > Lady O </td><td colspan=1 rowspan=1 > Short film </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018 </td><td colspan=1 rowspan=1 > Nika </td><td colspan=1 rowspan=1 > Nika </td><td colspan=1 rowspan=1 > Short film </td></tr>
</table>
Question:
What was Olga Fedori's longest role?
Answer:
Between 2010 and 2019, Olga Fedori played Frieda Petrenko in Holby City.