We're dividing 630985 by 87 
The aim is to understand the frequency of 87 in 630985.

On to step 1:
6 divided by 87 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 87

Step 2:
If we divide 63 by 87, we get 0 and a remainder of 63.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Append the next digit (0) from the dividend to 63 and continue with: 630 / 87

On to step 3:
630 divided by 87 is 7 with a remainder of 21.
The next digit of our result is 7. 
Result so far: 7.0
If we take 609 away from 630, we end up with 21.
Take the next digit (9) from the dividend and append it to 21, then repeat: 219 / 87

Advancing to step 4:
The number 87 fits into 219 2 times, leaving a remainder of 45.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
If we take 174 away from 219, we end up with 45.
Take the next digit (8) from the dividend and append it to 45, then repeat: 458 / 87

Moving on to step 5:
458 divided by 87 is 5 with a remainder of 23.
Write down 5 as next digit of the result. 
Result so far: 725.0
Subtracting 435 from 458 leaves us with 23.
Grab the next digit (5) from the dividend, add it to 23, then carry on: 235 / 87

Step 6:
87 goes into 235 2 times with a remainder of 61.
Put 2 as the next digit of the answer. 
Result so far: 7252.0
Subtracting 174 from 235 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 7:
87 goes into 610 7 times with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 7252.7
If we take 609 away from 610, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 8:
If we divide 10 by 87, we get 0 and a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 7252.7
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
87 goes into 100 1 times with a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 7252.701
Subtracting 87 from 100 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 10:
The number 87 fits into 130 1 times, leaving a remainder of 43.
Write down 1 as next digit of the result. 
Result so far: 7252.7011
The remainder is 43 after subtracting 87 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final outcome is 7252.7011, with a leftover of 0.00043.