We're dividing 70900250 by 355 
The aim is to understand the frequency of 355 in 70900250.

Let's proceed to step 1:
The number 355 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 355

Going ahead to step 2:
355 can be fit into 70 0 times, resulting in a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 70 to get 70.
Fetch the next digit (9) from the dividend, attach it to 70 and continue: 709 / 355

Advancing to step 3:
When dividing 709 by 355, we get 1 with a remainder of 354.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 355 from 709 leaves us with 354.
Bring next digit (0) of the dividend behind the 354 and repeat the process: 3540 / 355

Going ahead to step 4:
3540 divided by 355 is 9 with a remainder of 345.
The next digit of our result is 9. 
Result so far: 19.0
Deduct 3195 from 3540 and we're left with 345.
Bring next digit (0) of the dividend behind the 345 and repeat the process: 3450 / 355

Going ahead to step 5:
3450 divided by 355 is 9 with a remainder of 255.
The number 9 becomes the next digit in our result. 
Result so far: 199.0
If we subtract 3195 from 3450, we get 255.
Grab the next digit (2) from the dividend, add it to 255, then carry on: 2552 / 355

On to step 6:
When dividing 2552 by 355, we get 7 with a remainder of 67.
The next digit of our result is 7. 
Result so far: 1997.0
Deduct 2485 from 2552 and we're left with 67.
Take the next digit (5) from the dividend and append it to 67, then repeat: 675 / 355

On to step 7:
The number 355 fits into 675 1 times, leaving a remainder of 320.
The number 1 becomes the next digit in our result. 
Result so far: 19971.0
Subtracting 355 from 675 leaves us with 320.
Bring next digit (0) of the dividend behind the 320 and repeat the process: 3200 / 355

Moving on to step 8:
When dividing 3200 by 355, we get 9 with a remainder of 5.
Write down 9 as next digit of the result. 
Result so far: 199719.0
Deduct 3195 from 3200 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 9:
When dividing 50 by 355, we get 0 with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 199719.0
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 10:
355 can be fit into 500 1 times, resulting in a remainder of 145.
Write down 1 as next digit of the result. 
Result so far: 199719.01
Subtracting 355 from 500 leaves us with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Moving on to step 11:
1450 divided by 355 is 4 with a remainder of 30.
Record the quotient 4 as the next digit in the result. 
Result so far: 199719.014
The remainder is 30 after subtracting 1420 from 1450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 12:
If we divide 300 by 355, we get 0 and a remainder of 300.
Use 0 as the next digit of our solution. 
Result so far: 199719.014
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 13:
The number 355 fits into 3000 8 times, leaving a remainder of 160.
Write down 8 as next digit of the result. 
Result so far: 199719.01408
Subtracting 2840 from 3000 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 14:
1600 divided by 355 is 4 with a remainder of 180.
Use 4 as the next digit of our solution. 
Result so far: 199719.014084
Subtracting 1420 from 1600 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 15:
355 goes into 1800 5 times with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 199719.0140845
Subtracting 1775 from 1800 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 16:
If we divide 250 by 355, we get 0 and a remainder of 250.
Write down 0 as next digit of the result. 
Result so far: 199719.0140845
Subtracting 0 from 250 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

The final result is 199719.0140845 with a remainder of 2.5e-07.