85901912 divided by 600 
The aim is to understand the frequency of 600 in 85901912.

On to step 1:
The number 600 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 600

Advancing to step 2:
600 goes into 85 0 times with a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 85, we end up with 85.
Fetch the next digit (9) from the dividend, attach it to 85 and continue: 859 / 600

Going ahead to step 3:
600 goes into 859 1 times with a remainder of 259.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 600 from 859 to get 259.
Bring next digit (0) of the dividend behind the 259 and repeat the process: 2590 / 600

Going ahead to step 4:
If we divide 2590 by 600, we get 4 and a remainder of 190.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we subtract 2400 from 2590, we get 190.
Append the next digit (1) from the dividend to 190 and continue with: 1901 / 600

On to step 5:
When dividing 1901 by 600, we get 3 with a remainder of 101.
Use 3 as the next digit of our solution. 
Result so far: 143.0
If we subtract 1800 from 1901, we get 101.
Grab the next digit (9) from the dividend, add it to 101, then carry on: 1019 / 600

Going ahead to step 6:
600 goes into 1019 1 times with a remainder of 419.
Put 1 as the next digit of the answer. 
Result so far: 1431.0
If we take 600 away from 1019, we end up with 419.
Bring next digit (1) of the dividend behind the 419 and repeat the process: 4191 / 600

On to step 7:
600 goes into 4191 6 times with a remainder of 591.
Use 6 as the next digit of our solution. 
Result so far: 14316.0
If we subtract 3600 from 4191, we get 591.
Take the next digit (2) from the dividend and append it to 591, then repeat: 5912 / 600

Step 8:
The number 600 fits into 5912 9 times, leaving a remainder of 512.
Put 9 as the next digit of the answer. 
Result so far: 143169.0
If we take 5400 away from 5912, we end up with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Advancing to step 9:
600 can be fit into 5120 8 times, resulting in a remainder of 320.
Write down 8 as next digit of the result. 
Result so far: 143169.8
Deduct 4800 from 5120 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 10:
If we divide 3200 by 600, we get 5 and a remainder of 200.
Use 5 as the next digit of our solution. 
Result so far: 143169.85
If we subtract 3000 from 3200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 11:
If we divide 2000 by 600, we get 3 and a remainder of 200.
Put 3 as the next digit of the answer. 
Result so far: 143169.853
The remainder is 200 after subtracting 1800 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

On to step 12:
600 can be fit into 2000 3 times, resulting in a remainder of 200.
Use 3 as the next digit of our solution. 
Result so far: 143169.8533
The remainder is 200 after subtracting 1800 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 143169.8533, with a leftover of 0.002.