We look at the division of 61225661 by 309 
The aim is to understand the frequency of 309 in 61225661.

Moving on to step 1:
If we divide 6 by 309, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 309

Step 2:
309 goes into 61 0 times with a remainder of 61.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 61 and we're left with 61.
Fetch the next digit (2) from the dividend, attach it to 61 and continue: 612 / 309

Advancing to step 3:
The number 309 fits into 612 1 times, leaving a remainder of 303.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 309 from 612 and we're left with 303.
Grab the next digit (2) from the dividend, add it to 303, then carry on: 3032 / 309

Moving on to step 4:
The number 309 fits into 3032 9 times, leaving a remainder of 251.
The next digit of our result is 9. 
Result so far: 19.0
Subtract 2781 from 3032 to get 251.
Fetch the next digit (5) from the dividend, attach it to 251 and continue: 2515 / 309

Step 5:
When dividing 2515 by 309, we get 8 with a remainder of 43.
The next digit of our result is 8. 
Result so far: 198.0
Subtract 2472 from 2515 to get 43.
Bring next digit (6) of the dividend behind the 43 and repeat the process: 436 / 309

Going ahead to step 6:
The number 309 fits into 436 1 times, leaving a remainder of 127.
Record the quotient 1 as the next digit in the result. 
Result so far: 1981.0
Subtracting 309 from 436 leaves us with 127.
Append the next digit (6) from the dividend to 127 and continue with: 1276 / 309

On to step 7:
When dividing 1276 by 309, we get 4 with a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 19814.0
Subtracting 1236 from 1276 leaves us with 40.
Grab the next digit (1) from the dividend, add it to 40, then carry on: 401 / 309

On to step 8:
If we divide 401 by 309, we get 1 and a remainder of 92.
The next digit of our result is 1. 
Result so far: 198141.0
Subtract 309 from 401 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Let's proceed to step 9:
If we divide 920 by 309, we get 2 and a remainder of 302.
Use 2 as the next digit of our solution. 
Result so far: 198141.2
The remainder is 302 after subtracting 618 from 920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Let's proceed to step 10:
If we divide 3020 by 309, we get 9 and a remainder of 239.
Write down 9 as next digit of the result. 
Result so far: 198141.29
The remainder is 239 after subtracting 2781 from 3020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

On to step 11:
2390 divided by 309 is 7 with a remainder of 227.
Record the quotient 7 as the next digit in the result. 
Result so far: 198141.297
Subtracting 2163 from 2390 leaves us with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

On to step 12:
309 goes into 2270 7 times with a remainder of 107.
Put 7 as the next digit of the answer. 
Result so far: 198141.2977
Subtract 2163 from 2270 to get 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

The quotient of the division is 198141.2977, and the remainder is 0.00107.